Biology 1983- 2004
Jamb 2024 Biology likely Questions & Answers
Past Questions
- Root hairs are developed from the …
Biology 1983
- a protein B. a carbohydrate, C. a fat
- root apex B. epidermis of roots C. vascular bundles D. endodermis
- pericycle
Use Fig. 1 to answer questions 2-4
Fig 1
Fig 1 represents a cross-section of a part of a dicot plant.
- Which of the following features can be used to identify Fig1?
- Position of 7 B. Its circular nature C. Number of5 D. Presence of 3 E. Width of 2.
- The main function of 6 isto
- separate5 from7 B.producemoreof 5 and 7.
- produce cork D. translocatewater and mineral salt E. conduct carbon dioxide to the other parts.
- The main function of 4 isto
A.surround the inner tissues B. produce cork
- produce root hairs D. produce lateral roots
- produce more of 3.
- In adicotleaf,guardcellsdifferfromother epidermal cellsbecausethey
- have no definite shape B.lacknuclei
- are smaller D.containchloroplasts E.lack vacuole.
- Which ofthe following structuresis NOT found in the femaleagamalizard?
- Pre-anal pads B. Eardrum C. Gularfold
- Nasalscale E. Nuchalcrest.
- Herbs differ from shrubs because they A. do notproducefruits B. are useful to herbalists C. do not become woody D. are onlyannuals E. are only perennials.
- Ifan isolatedlivingcellisleftin distilledwaterfortwo hours,itislikelyto
- losesomeofitswaterto the surrounding water
- loseallofitswaterto thesurroundingwater
- reproduce by binary fission D. become more turgid. E. die due to excess water.
- If an organic compound has its Hydrogen: Oxygen ratio as 2:1, it islikely to be
- afatty acid and glycerol E. an aminoacid.
- Which ofthe following elementsare necessaryforthe formationofchlorophyllinaplant?
- Magnesium and iron B. Calcium and potassium C. Calcium and sulphur D. Potassium and sulphur E. Phosphorus and potassium.
- Which ofthefollowing statementsisNOT trueof mammalianerythrocytes?
A.They have haemoglobin B. Theyappear yellow
when lookedatsingly C.Theyare disc-shaped
- The cells are more numerous than leucocytes E. Theyhave nuclei at maturity.
- In woody plants, gases and water vapour are transported across the stems by the
A.xylemfibres B.medullaryfibres C.medullaryrays
- phloemfibres E. phloem parenchyma.
- Which ofthe following substances is NOT found in urine?
A.WaterB.SodiumchlorideC. Nitrogenouscompounds D. Calcium chloride E. Nitrogenous salts.
- The kidneys of all vertebrates act as osmo regulators. This means that they
- keepthe composition ofthe plasma constant
B.regulate osmoticprocesses C. Controlthevolumeof blood entering the kidneys D. decrease the osmotic
pressure of blood E. increase the osmotic pressure of blood.
- The movement of part of a plant in response to external stimulus of no particular direction is
- taxism B. tropism C haptotropic movement
D nastic movement E. phototropism
- The part of the mammalian brain responsible for maintaining balance isthe
- medullaoblongata B. olfactory lobe
- cerebellum, D.cerebrum E.frontallobe.
Fig vertical section of onion bulb.
Which of the labelled parts in Fig 2 will develop into a new bulb? A. 1 B. 4 C. 2 D. 3 E.5.
- In the onion bulb, food is stored in the A. stem B. lateral buds C. cotyledons
- outer scale leaves E. leaf bases.
- Groundnutis notreallya ‘nut’in thebiologicalsense because
- it is harvestedfrominsidethe ground B. its pericarp isnot hard and tough. C. the fruitissucculent
- it is an achene.
- What type of fruit is formed from a single flower having several free carpels?
- multiplefruit B. Simplefruit C. Aggregatefruit D. Dehiscent fruit E. Indehiscent fruit.
- A 28g soil sample was heated to a constant weight of 24g. When further heated to red hot and cooled, it weighed 18g. What is the percentage of hurmus in the soil?
- 22.2 B. 55.6 C. 75.0 D. 25.9 E. 35.7. 22. Which of the following diseases is NOT caused by a virus?
- Rinderpest B. Maize rust C. Newcastle disease D. Swine fever E. Cassava mosaic disease.
- A centipede differsfrom a millipede by its A. colour B. numerous abdominalsegments
- pairedlegsoneachabdominalsegment
- poison claws E. cylindrical body.
- An organism having one pair of identical genesis A. a heterozygote B. a hybrid C. an allelomorph D. a homozygote E. a diploid
- Plants which can survive in places where the water supply islimited are
A .bryophytes B.mesophytes C. xerophytes
D.hydrophytes E. pteridophytes.
- Banana, plantain and pineapple can be grouped together because they
A.producesmallseeds B. aremultiplefruits
- produce suckers D. haverunners E. have bulbils.
- One disease NOT caused directly by bacteria is A.malaria B. tuberculosis C. pneumonia D.tetanus E. cholera.
- In what order do the following structures develop duringthemetamorphosisofthetoad?1.External gills 2.Internalgills3.Forelimbs4.Hindlimbs 5.Mouth.
A.1 2345 B.15243 C.13 45 D.534 12
- 54 32 1.
- The dental formular i 3/3: c 1/1: pm4/4:m2/3 = 42 represents that of a
- rabbit B. full grown man C. youngchild D. dog E. sheep.
- Which of the following statements is NOT true of insectivorous plants?
- They obtain part of their food by trapping and feeding on insects B. Theyattract insects simply because of pollination. C. They can grow in soils poor in nitrogenous salts. D. They can supplement the
nitrogen supply by feeding on insects E. Examples include butterworts, sundews and pitcherplants.
- Which of these worms is beneficial to man? A. Hookworm B. Tapeworm C. Roundworm D.Earthworm E. Gunieaworm.
- Starting from the skull end, the vertebrae are arranged in the following order:
- axis, atlas, cervical, thoracic and limbar
- atlas, cervical, axis, thoracic andlumbar
- atlas, axis, thoracic, cervical and lumbar
- atlas, axis, cervical, thoracic and lumbar
- atlas, thoracic, cervical axis and lumbar.
- Which of the following diseases could be exclusively associated with a river basin?
- Malaria B. Syphilis C. Onchocerciasis
- Cholera E. Poliomyelitis.
- Which of the following represents the evolutionary sequence in these plants? 1. Flowering plants, 2. Ferns, 3. Mosses, 4. Algae, 5. Conifers.
A.2⓪1⓪4⓪3⓪5 B.5⓪4⓪3⓪2⓪1 C.2⓪4⓪5⓪1⓪3 D.
3⓪2⓪4⓪5⓪1 E.
4⓪3⓪2⓪5⓪1
- Which ofthe following will NOT allow osmosisto take place?
- pig’s bladder B. Cellophane C. Parchmentpaper D. Transparent polythene E. Cow’s bladder.
- Which of the following statements on the mammalian circulatory system is Nottrue?
A.Blood in the pulmonary artery is richer in
oxygen content than blood in the pulmonaryvein
B.Thebloodin thehepatic portalvein isthe richestin food substances. C. Blood flow is controlled by
valves in theveins D. Arteries are generally
thicker andlargerthan veins. E.Fibrin helpsin the formation ofbloodclot.
- In a positive phototropic response of a coleoptile, the region of greatest curvature is brought about by the A. movement of auxins away from theregion of
curvature, B. even distribution ofauxins in all parts ofthe coleoptile, C.inhibitionofgrowth
byauxins in the region of smaller curvature
- concetrationn of auxins in the region of curvature E. absence of auxins in the coleptile.
- The tuber ofcassava is NOT a stemtuber because it A. is distended with food reserve B. has an aerial shoot portion C. has other structures that
could becalled roots D. lacksaxillarybuds
- has a bark over its stored food.
- The function of the ossicles (maleus, incus and stapes) in the mammalian ear isthe
- transmission of vibrations B. regulation of
pressures C.supportofthe inner ear
- maintenance of balance during motion
- secretion ofoil.
- Which of the following instruments is used for determining turbidity of water?
- Thermometer B. Secchi Disc C. Rain gauge D. Hygrometer E. Wind vane.
- Which of the following is NOT a characteristic of
monocot plants?
- occurrence ofsecondary thickening B. Parallel venation C. Scattered vascular bundles
- Floral parts arranged in threes, E. Periath is usually insignifdicant
- Which sequence represnts the correct order of organism in a food chain? 1. Toad, 2.Mucuna, 3. Grasshopper, 4.Snake, 5.Hawk.
- 5 4 1 3 2 B. 1 2 3 4 5
- 2 1 3 4 5 D. 2 3 1 5 4
- 2 3 1 4 5
- In Rhizopus, carbonhydrate is stored in the form of A. glucose B. paramylon C. glycogen D. starch E. oil 44. Which of the following statements about the rate oftranspiration isINCORRECT? It is
A.dependent on temperature B. affected by changesin light intensity C. unaffected byhumidity
- dependent on air movement E. affected by
availability of water.
- ‘Jointed skeleton’ is absent in the
- cockroach B. spider C. millipede D. snail
- dragon fly.
- Which of the following statements about the definition of man is Incorrect? Man has
- moremolarsthanincisors B. nodiastema
- the same number of teeth on upper and lower jaws D. a total of thirty-two teeth E. a total of six molars.
- When a Spirogyra cell isimmersed in a salt solution more concentrated than its cell sap,it
- remains unchanged B. takes up water and burst C. absorbs a littlewater D. loses water and shrivel E. becomes turgid.
- Urea is produced in the
A.liver, B.Ladder, C.spleen, D.kidneys.E.gallbladder
- What isthegeneticration oftheF2generation if members ofFgenerationareallowedtoself-pollinate?
- 1tall: 3short B. 3 tall:1 short C. 1 tall: 1 short D. 4 shorts: 0 tall E. 4 tall:0 short
- Thepath taken byglucosefromtheileumtothe heartis A. ileum hepaticportalvein hepatic artery vena cava heart. B. ileum hepaticportal
artery hepaticartery venacave heart.
- ileum hepaticportalvein vena cava heart D. ileum hepaticvein vena cava heart.
- ileum hepaticportal vein hepatic vein vena cava heart.
Biology 1984
- The mouth part of the housefly are adapted for A. lapping and sponging. B. sucking andchewing. C. piercing and sucking. D. chewing and lapping. E. biting and chewing.
- The male toad differs from the female by having A. vocal sacs.B. shorter hindlimbs.
- longer fore limbs. D. bulging eyes.
- nictating membrane.
- Mosses, liverworts and ferns can be grouped together because they
- areallequaticplants.B. allgrowin deserts.
- are seedless plants. D. have undifferentiated plant bodies. E. all produce colourless flowers.
- Spirogyra and Mucor can be grouped together as Thallophyta because.
- theyare unicellular organism B. their spores
could be dispersed by wind C. they are capable
of living independent lives D. they reproduce sexually only E. their bodies are made up of thallus and filamentsalternatively.
- Which of the following invertebrates does NOT possess antennae?
- Centipede B. Crustacean C.Millipede D. Insect E. Spider
- Which ofthe following isINCORRECT? The prothallus of afern
- isa flattenedheart-shapedstructure.
- is green becauseits cells contain chloroplasts
- is the dominant plant D. bears the sexual organs E. is attached to the ground by numerous rhizoids.
- Which of the following cell constituents is NOT common in both plants andanimals?
- Mitochondria B. Chloroplasts
- Ribosomes D. Golgi apparatus
- Vacoules.
- Thecharacter-producing factorsinlivingorganismsare A. chromomeres B. alleles C. chromatids
- chromosomes E. genes.
- A mixture ofmercurous and mercuric nitratesis added to a food substance. A white precipitate is formed which on gentle heating turns red. The food
substance is
- protein B. oil C. Carbohydrate
- Fat E.Fatty acid.
- Themammalian organ through which nourishment and oxygen diffuseinto a developing embryois called A. amnion B. chorion C. umbilicalcord D. oviduct E. placenta
- Fig1 represents a quillfeather.The structurelabelled “M” isthe
- quill B. rachis C. superior umbilicus
- inferior umbilicus E. aftershaft
- Osmosis can be defined as the movement of A. molecules from solution of highconcentration
to low concentration B. molecules from solution of low concentration to ]high concentration
- water from solution of high concentration to low concentration D. Water across a semi-permeable membrane from solution of lowconcentration to high concentration E. water across a semi-permeable membranefromsolution of high concentration
to low concentration
- Which ofthefollowing statementsisNOT trueof enzymes? They
- are proteins B.needcofactorsto activate them C. are sensitiveto hydrogen ion concentration
- arespecificin theiraction
- canwithstandhightemperatures.
- The dorsal and anal fins of fish are used for A. upward movements B. controlling rolling movements C. downwardmovements
- steering E. buoyancy.
- Exoskeleton is NOT found inthe
- maggot B. mosquito larva C. earthworm
- caterpillar F. termite
- Blood clotting is initiated by
- leucocytes B. platelets C. haemolymph D. haemoglobin E. erythrocytes
- Pepsin is a digestive enzyme which breaks A. cellulose into glucose molecules
- carbohydrates into simple sugars
- protein into peptones D. fats into glycerol and fatty acids E. sucrose into glucose and fructose.
- Anaerobic respiration in yeast produces A. carbondioxide and ethanol B. carbondioxideand water C. carbondioxide and oxygen
- carbondioxide and glucose E. ethanol and water
- Underground stems which grow horizontally through the soil are
- blubs B. rhizomes C. runners
- corms E. stolons
- A man with a normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin?
- AA B. OO C. AO
- AS E. SS
- In a Biuret test, some protein was mixed with sodium hydroxide solution. Which of the following
chemicals should be added to the mixture for a positive result?
- Mercurous nitrate B. Coppersulphate
- Mercuricnitrate D. Sodium carbonate
- Ammoniumhydroxide
- The removal of a man’s pancreas by surgical operation can affect only the digestion of
- starch B. starch, protein and fats
- oils and fats D. proteins
- carbohydrate and fats.
- The parts used by tapeworm to fasten itself to the host’s intestine are the
- neck and suckers B. hooks and suckers
- rostellum and suckers
- young proglottis and neck E. rostellum,
hooks and suckers.
Use Fig 2 to answer questions 24 – 25
Fig 2. transverse section of a fowl’s egg
- The young chick is formed from
- 3 B. 3 and 4 C. 1,3 and5 D. 2 E. 4
- Which parts provide food forthe developing chick? A. 2 and 3 B. 4 and C. 3 and 4
- 2 and 5 E. 1 and 2
- Which of the following types of vertebrate occur in equal numbers in the rabbit, rat and man?
- Caudal B. Thoracic C. Lumbar
- Cervical E. Sacral
- Which of the following statements is NOT true of the piliferous layer of a root?It
- has a very thin cuticle B. is the outermost layer of the cortex C. may bear root hairs
- breaks down as the root ages
- is replaced by cork inold roots.
- A flowering plant is monoecious if
- the androeciumisfoundon oneplant
- thegynoeciumismonocarpous
- it producesessential organs D. the gynoecium and androeciumareon thesameplant
- theflowers areunisexual
- How many nuclei are found in a pollen tube during fertilization?
- 2 B. 3 C. 5 D. 6 E. 7
- Which ofthe following isNOT a wasteproduct ofplants? A. Tannis B. Oxygen C. Carbondioxide D. Sap E. Alkaloids
- If an animal is very active and hasgood muscular control, it islikely to have well-developed
- olfactory lobes B. cerebralhemispheres
- optic lobes D. cerebellum E. spinal cord
- Which of the following adaptations is NOT concerned with the flight ofbirds?
- Streamlined shape B. Presence of powerful muscles C. Reduced body weight D. Broad sternum
- Webbed feet.
- The transectmethod can be used in ecologyto showthe A. numberofplantsandanimalsin a habitant
- population of a plantspecies
- distributionoforganismsalongaline
- heightsoftreesin a section of a forest
- number ofyoung plants across a forest.
- Asexual reproduction does NOT occur in A. Mucor, Spirogyra and Paramecium
- Penicillium, Paramecium andAmoeba
- Mucor, Rhizopus andpenicillium
- Amoeba, spirogyra and Mucor
- Rhizopus, Ascaris and Amoeba.
- Fehling’ssolution will readily change colour from blue to a reddish colour when it is
- mixedwithsugarsolutionin thecold
- warmedorheatedbyitself
- mixedwithreducingsugarin thecold
- warmedorheatedwitha complexsolution
- warmedwitha solution ofreducingsugar.
- Normally the flowof blood is NEVERfrom A. arteryto arterioles B.arterioles to capillaries
- capillaries to venules D. arterioles to the artery E. venules to the vein
- Heat produced in tissue respiration in plants is A. a chemicalfromofenergy B. theonlyformofenergy C. the main form ofenergy D. a useful form of energy E. a waste from of energy.
- The axial skeleton of a mammal does notinclude the bones of the
- skull B. tail C. limbs D. back E. neck.
- Which of the following sequences represents the process of blood clotting? 1. Fibrin forms a network of threads 2Red bloodcellsare caught and a clotisformed 3. Fibrinogen in plasma changes into solube fibrin 4. Blood is exposed to air.
- 4,3,2,1 B. 4,3,1,2 C. 3,1,4,2 D. 1,2,3,4
- 3,1,2,4.
- Green plants are important in the ecosystem because they are
- primary consumers B. producers
- decomposers D. secondary consumers
- scavengers.
- An anenometer is an instrument formeasuring A. relative humidity B. altitude C. wind speed D. turbidity E. salinity.
- Which of the following is NOT regarded as a pollutant on land or in the air?
- Noise B. Smoke C. Sulphur dioxide
- Carbon monoxide E. Nitrogen
- Which of the following groups of factors is completely abiotic?
- salinity, tide, plankton, turbidity
- Temperature, pH, soil insect
- Wind, altitude, humidity,light
- Conifers, winds, pH,rainfall
- Soil, water, bacteria,salinity
- Which of the following lists of diseases, their causes and transmission is CORRECT?
- Cholera,virus,severediarrhoea,infectedwater.
- Malaria,protozoan,high fever,contactwithinfected person C. Syphilis, virus, veneral disease, sexual
intercourse D. Smallpox,virus,skinwithblister, close contact with infected person. E. Sleeping
sickness, bacteria, tiredness, headaches and dozing, tsetse flybite
- Erosion can be reduced along a slope by A. ridging across slope B. ridging up slope
- ridging down slope D. croprotation
- bush fallowing system.
- If a handful of soil is shaken with water and leftto settle, the soil particles will settle from light to heavy particles as follows:
- humus, clay, silt,sand,stones B. humus,
silt, clay,sand,stones C. humus, clay silt,
stones,sand D. humus, sand, silt, clay,stones
- clay, humus, silt, sand, stones.
- Denitrifying bacteria in nature liberate gaseous nitrogen directlyfrom
- ammonium salts B. soil nitrates
- thunderstorms D. soilnitrites
- plant and animal proteins.
- Leaching is
- washingawayofhumusfromthesoilsurface
- reduction ofsoil aeration bypressure
- soilerosion bymeansotherthan rainfall
- lossoforganicmatter due toexposureto
direct sunlight E. washing out of chalk and limestone from upper layers of soil by heavy rains
- The process of soil erosion is usually from A. rill sheet gully B. gully rill sheet C. sheet gully rill D. sheet rill gully E. rill gully sheet
- In Spirogyra, the pryrenoid
Biology 1985
- A group ofsimilar cells performing the same
- excrete waste products B. is suspended by cytoplasmic strands C. is mainly used for
respiration D. usually containsstarch
- makes the plant slimly to touch.
- In which of the following groups of animalsare flagella and ciliafound?
- Flatworms B. Annelids C, Coelenterates
- Protozoa E. Nematodes
- Which of the following is seed bearing? A. Mosses B. Whistling pine
- Algal filamentsD. Livewort
- Fern fronds.
- Each ofthe following is an arthropod EXCEPT the A. crab B. spider C. snail D.millipede
- cockroach
- In fish the sense organs which detect movements in the water are located within the
- gills B. operculum C. nostrils D. medianfins E. lateral line.
- Euglena is an autotrophicorganismbecauseit A. has flagella B. has plant and animalfeatures C. is found in water D. can manufacture its food E. moves fast.
- Which of the following is NOTtrue of Mucor? It A. contains chlorophyll B. grows saprophytically C. bears spores in sporangium
- consists of hyphae
- reproduces by conjugation
- Byrophytes are different from flower because they A. live in moist habitats B. are small plants
- reproduce sexually and a sexually
- have small leaves
- have no vascular tissues.
- At what stage in the life history of a toad is its mode of breathing similar to that of a fish?
- Tadpole stage B. External gillstage
- Adult stage D. Internal gill stage
- Larval stage.
- In lower plantslikemosses,the structurewhich performs thefunctionsofrootsofhigher plantsis called
- root hairs B. rootlets C. hyphae
- rhizoids E. thalli.
- In an angiosperm leaf, the xylem is
- beside the phloem B. surrounded by the phloem C. above the phloem D. around the phloem
- in separate bundles from the phloem.
function is
- an organ B. a system C. a tissue D. an organelle E. an enzyme.
- Which ofthe followingis common to a dicotyledonous stem and a monocotyledonousroot?
- Medullary rays B. Central pith
- Wide cortex D. Narrow cortex
- Pericyclic fibres.
- Which of the following represents the sequence of protein hydrolysis? 1.Polypeptides 2.Amino acids 3. Proteins 4. Peptones
- 3⓪1⓪2⓪4 B. 3⓪2⓪4⓪1C. 3⓪4⓪2⓪1 D. 3⓪4⓪1⓪2 E. 3⓪1⓪4⓪2
- A food substance which produces red colouration with Sudan III contains
- protein B. sugar C. starch
- cellulose E. fat.
- If calcium is deficient in food this may cause A. anaemia B. retarded growth
- sterility D. goitre E. beri-beri
- Partially digested food ready to leave the stomach is referred to as
- chyme B. curd C. glycogen D. paste E. roughage
- The function of lymph nodes is to
- supply oxygen B. filter out bacteria
- form red blood D. supply amino acids
- supply simple sugars
- The vein which returns blood from the head and armsto the heart is called
- aorta B. inferior vena cava C. superior vena cava D. pulmonaryvein E. pulmonary artery.
- Blood platelets are important because they A. are amoeboid and nucleated B. produce
antitoxins C. produce antibodies
- digest harmful bacteria E. release thrombin for blood clotting.
- If a child can receive blood from all donors, he belongs to the blood group
- O B. A C. B D. AB E. AS.
- Which of the following events does NOT occur during anaerobic respiration of glucose?
- Muscle cell produce lactic acid B. Carbon dioxide is produced C. Milk bacteria produce lactic acid D. Energy is not produced
- Germinating seeds produce alcohol.
- Identifywhich ofthefollowingare characteristics of thevertebraterespiratorysurface1. Moist2.Vascularized 3. Semipermeable 4. Freelypermeable 5. Dry
- 1,2,3 B. 1,2,5 C. 2,3,5 D. 2,4,5 E. 1,3,5.
- In mammals,thefunctionofthesebaceousgland isto A. produce sweat B. secrete sodium
- secrete water D. produce an oily substance E. manufacture vitamin D for the skin.
- Which of the following organs regulates the amount of amino acids and glucose in the body? A. Kidney B. Liver C. Pancreas D. Spleen
- Stomach.
Use thediagrambelow to answer questions 26 and27 Fig. 1
- Bowman’s capsules are locatedin the part labelled A. 1 B. 2 C. 3 D. 4 E. 5 F. 6
- Re-absorption of useful materials takes place in the partslabeled.
- 1 and 3 B. 3 and 5 C. 5 and 6 D. 6 and 7 E. 2 and 4
- Movements and positions of the head in man are detected by the
- cochlea B. malleus C. utriculus D. semicircular canals E. outer
- The appendicular skeleton is made up of the A. limbs B. skull and limbs C. phalanges
- ulna and radius E. girdles and limbs.
- The maize grain is a fruit and not a seed because it A. has alargeendosperm B. isformedfroman ovary C. is a monocotyledon D. has no plumule and radicle E. has a hypogeal germination.
- If a flower is protandrous then it
- must be unisexual B. has an undeveloped
anroecium C. has no anroecium D. must
be insect pollinated E. can prevent self
pollination.
- For pollen to be released in Crotalaria the insect must depress the
- wing B. keel C. standard D. antepetalous stamen E. antesepalousstamen.
- Irish potato is a
- bulb B. tap root C. rhizome D. roottuber
- stem tuber.
- Thecharactersbywhich an organism isrecognizedare termedits
- phenotype B. genotype
- morphology D. anatomy E. physiology.
- The hereditarymaterial in a cell is known as A. ADP B. CNS C. RNA D. ATP E. DNA.
- A young plant showing yellow leaves is likely to be deficient in
- calcium B. magnesium C. potassium
- boron E. molybdenum.
- Germination which results in the cotyledons being brought above ground is called
- hypocotyls B. epicotyl C. epigeal
- hypogeal E. plumule.
- Themammalian endocrinesystemisresponsiblefor A. transmitting impulses B. regulating body
temperature C. regulating osmotic pressure ofblood D. chemical co-ordination E. the manufacture of blood.
- An old man is likely to be long-sighted because age effects the
- optic nerves B. retina C. ciliary muscles D. cornea E. aqueoushumour.
- In amammal,stimulusistransferredfromthereceptor muscle to the central nervous system throughthe
- motor neurons B. effectormuscles
- dendrites D. sensory neurons E. synapses.
- A relationship between living organisms which is of mutual benefitis
- parasitism B. saprophytism C. ecosystem
- symbiosis E. commensalisms.
- Which of the following food chains is in thecorrect sequence?
- Weeds Tadpoles Beetles Fish Man B. Weeds Tadpoles Fish Beetles Man. C.Tadpoles Beetles Weeds Man Fish
- Man Fish Beetles Tadpoles Weeds
- Fish Beetles Tadpoles Weeds Tadpoles.
- The primary and secondary hosts respectively of bilharzia are
- fishandman B. man anddog C. snail and man D. man and snail E. fish and snail
- Which ofthe following isNOTcausedbybacteria? A. Cholera B. Gonorrhoea C. Tuberculosis
- Onchocerciasis E. Typhoid.
- Tsetse fly is harmful to man because it is associated with the spread of
- river blindness B. malaria C. sleepingsickness
- leprosy E. dysentery.
- Soil erosion CANNOT be controlled by A. planting cover crops B. contouring of sloping ground C. terracing ofslopes D. laying ofmulch E. burning of bush
- Waterretention ishighestin soilswhich are rich in A. sand, poor in humus and devoid of clay B. clay and sand, but poor in humus
- clay and humus, but poor in sand
- clay, poor in humus and devoid of sand
- Sand and humus, but poor in clay
- The origin of mineral particles in the soil is A. humus B. water C. micro-organisms D. weathered rock E. organic matter
- Atmospheric nitrogen is directly replenished in nature through
- the activities of denitrifying bacteria
- the breakdown of ammonium saltsin the soil C. the activities of nitrifying bacteria
- theactivitiesofnitrogen-fixing bacteriain rootnodules E. egestion, death and decay
- The initial volume of water poured into a bag of dry soil was 50ml and the amount that drained through was 35ml. The percentage water content of the fully soaked soil istherefore
- 46.7 B. 25.0 C. 20.0 D. 30.0 E. 58.3.
Biology 1986
- Viruses are regarded as non-living because they A. can neither reproduce asexually nor sexually B. cannot survive in their respective environments C. do not possess characteristics to the next
- can neither respire nor excrete.
- Which of the following pairs are fully adapted to terrestrial life?
- Ferns and algae B. Ferns and mosses
- Bryophyte and flowering plants.
- Flowering plants and conifers.
- Which of these animalsis radically symmetrical? A. Squid B. Hydra C. Snail D. Cockroach.
- Which of the following has cones?
- Angiosperm B. Gymnosperm C. Pteridophyte D. Bryophyte .
- For effective functioning of a bird’s quill feather, hooks fit on the ridges of the
- vane B. rachis C. barbules D. barbs.
- Which of the following is NOT true of Spirogyra? A. Reproduces by conjugation B. Reproduces by fragmentation C. Consists ofbranchedfilaments
- Consists of unbranched filaments
- Which of the following lacks chaetae, tentacles and antennae?
- Snail B. Crab C. Millipede D.Earthworm.
- Incomplete metamorphosis inthe
- butterfly B. grasshopper C. mosquito
- housefly
- Fishes are cold-blooded because their body temperature is
- constantly low B. constantly high
- dependent on that of their surroundings
- regulated at will
- When the original king and queen of termitesdie, they are replaced by
- the king and queen of another colony
- some adultreproductivesfromthesamecolony C. someadultworkerswhicharespeciallyfedtobreed. D.Developing nymphs nurtured as secondary
reproductives.
- Themalecockroachdiffersfromthefemalebyhaving
- mandibles B. a pair of styles C. spiracles
- a pair of cerci.
- The fins making up the limbs of the bony fish are A. caudal and ventral B. ventral and pelvic
- pelvic and pectoral D. pectoral and dorsal.
- The stem differs from the root in having the xylem and phloem strands
- on the same radii B. scattered C. on alternate radii D. towards the pith.
- Oxygen liberated during photosynthesis has been demonstrated to comefrom
- carbon dioxide B. air C. water D. chlorophyll.
- Which of these is a trace element?
- Iron B. Copper C. Calcium D. Sulphur.
- The main organic substances found in the human body are
- carbohydrates, proteins and salts B. salts, fats and proteins C. fats, carbohydrates and
proteins D. salts, fats and carbohydrates.
- Which of the following elements is essential for the formation ofhaemoglobin?
- Sodium B. Potassium C. Calcium D. Iron.
- The severe deficiency of vitamin C leadsto A. kwashiorkor B. beriberi C. pellagra D. scurvy
- In addition to the high calories derived from fats and oils, they are
- used in producing newcells B. necessary for enzyme formation C. used as insulators fromcold
- required for growth
- The extract from a food substance reacting with sodium hydroxide and copper sulphate solutions will produce violet to purple coloration if
- fats are present B. carbohydrate is present
- protein is present D. reducing sugar is present.
- The three important organs that are situated close to the stomach are
- kidney, liver and gall bladder B. pancreas, liver and kidney C. liver, kidneyand spleen D. gall bladder, pancreas andspleen.
- Evidence that a tooth is a living part of the mammalian body can be found withinthe
- gum B. pulp cavity C. cement D. enamel.
- Blood circulation in a mammal issaid to be double because
- it passes twice through the heart in the complete circuit B. it moves in both arteries and veins
- it circulates in both the heart and other organs D. the heart contains auricles and ventricles
- Which isthecorrect orderofwaterlossfromthe leaf? 1 Mesophyll 2 Veins 3 Substomatal cavity4 Stomata A. 3 2 1 4 B. 2 3 1 4 C. 2 1 3 4 D. 1 2 3 4.
- The aperture between the left auricle and the left ventricle is guarded by the
- auricular valve B. tricuspid valve
- ventricular valve D. bicuspid valve.
- A major limitation in the use of the potometer for measuring the rate of transpiration isthat
- itismadeofbreakableglassmaterial
- itmeasurestherate ofwaterintake
C.it measuresthe rateofwaterlossthrough the stem only D. the movement of the air bubble in the
potometer cannot betimedaccurately.
- Which of the following statements is not correct with respect to inhalation in mammals?
- intercostal muscles contract B. diaphragm israised C. ribs are raised D. pressure of the thoracic cavity decreases.
- The equation that can be used to summarize the process of anaerobic breakdown of sugar is
- C6H12O6+2C2H5OH +2CO2
- 6CO2 + 6H2O ’! C6H12O6 + 6O2
- C6H12O6 + 6O2 ’! 6CO2 + 6H2O+energy
- C6H12O6 ’! 2C2H5OH + 2CO2 +energy.
- If a person is bitten by a snake on the leg, it is advisable for the person
- keep moving so that the venom will ooze out with bleeding B. wash the wound with water containing antiseptic C. bandage the wound so that germs do not get in through it D. keep still and apply a
tourniquet above thewound.
- Deamination occurs in the
- kidney B. pancreas C. spleen D. liver.
- In the mammalian skin, melanin and keratin are contained in the
- sebaceous gland B. sweat gland
- subcutaneous layer D. malpighianlayer.
- Two main distinguishing features of the cervical vertebra are the presence of
- short neural spine and vertebraterial canal B. prezygapophysis and cervicalribs
- large centrum and cervical ribs
- vertebraterial canal and large centrum
- Nastic movement is
- response to light stimulus B. non-directional C. directional D. response to internal stimulus
Use the figure below to answer questions 34 to 36
Vertical section of a maize grain
- Which of the labelled parts will develop into a new maizeplant?
- 2 B. 3 C. 4 D. 5.
- The structure labelled 1 isthe
- plumule B. radicle C. cell membrane
- seed coat
- The main function of the structure labelled 2 is to A. protect the inner parts of the seed
- nourish the embryo and the growing parts C. keep theinner parts moist
- maintain the shape of theseed.
- Gestation in mammals isthe period
- required for growth after birth
- between the formation of the foetus and birth C. of development from zygote to birth
- before theformation of the zygote.
- If a woman who is a carrier ofsickle cell trait (AS) married a man who is a sickler (SS) and they had four children how many of them would benormal A. Three B. Two C. One D. None
- Which of the following is an example of discontinuous variation?
- Skin coloration B. Left-handedness C. Body weight D. Height
- The hormone which regulates the amount of glucose in the blood is called
- adrenalin B. auxin C. insulin
- thyroxine.
- An instrument that can be used to demonstrate phototropism and geotropism in plants is the
- auxanometer B. potometer C. klinostat
- photometer.
- In an ecosystem, animals which feed directly on plants are called
- secondary consumers B. primary consumers C. producers D. predators
- In an agricultural ecosystem, the biotic component consists of
- crops, pest and beneficial insects B. crops, temperature and humidity C. pests, beneficial insects and water D. crops, water and soil.
- Which of these diseases CANNOT be prevented byimmunization?
- Poliomyelitis. B. Tuberculosis
- Cholera D. Onchocerciasis
- Which of the following ecological factors are common to both terrestrial and aquatic habitats? A. Rainfall, temperature, light and wind
- Salinity, rainfall temperature and light
- Tides, wind, rainfall and altitude
- Ph,salinity,rainfall and humidity
- In a community,bacteriaandfungiarereferredtoas A. producers B. decomposers C. scavengers D. consumers
- The swollen shoot disease of cocoa tree is caused by a A. virus B. fungus C. bacterium D. protozoan
- A large percentage of tropical soils tend to be acidic because they
- contain large quantities of potash B. contain large quantities of lime C. lose a high proportion of their organic matter torunning water D. lose lime and
potash fromthe top soilthrough rain action
- Thefollowingaremethodsofsoil conservationEXCEPT A. contour terracing B. strip cropping
- contour ploughing D. mixed grazing
- Samples of different soil types are packed in glass tubes whose lower ends are plugged with cotton wool. If these tubes are suspended in a trough of water, water will rise highest after a few hoursin A. sand B. loam C. clay D. humus.
Biology 1987
- The function of endoplasmic reticulum is A. protein synthesis B. intracellular transportof materials C. digestion and destruction of foreign bodies D. production of energy from glucose.
- Which of the following features of Euglena is found only inanimals?
A.Paramylumgranules.B.FlagellumC.Pellicle
D.Pyrenoid.
- An organism found on a bare rock surface has features of algae and fungi. The organism is
- an empiphyte B. a lichen C. a bryophyte D. a fern.
- In a plant exhibiting alternation of generations, the diploid multicelluar stage is known as
- gametophyte B. spermatophyte C. holophyte D. sporophyte.
- A characteristic that distinguishes bryophytes from flowering plants isthe
- possession of true stems and leaves B. ability to reproduce asexually C. absence of vascular tissues D. ability to grow in moist habitats.
- A good example of a diploblastic organism is A. Amoeba B. Hydra C.Earthworm D.Roundworm.
- Thefunction oftheclitellumin theearthwormisto A. aid digestion B. prevent desiccation C. assist locomotion D. secrete cocoon.
- The crayfish is an arthropod because
- its body consists of a cephalothorax and an abdomen B. it has a pair each of antennaeand antennules
- everysegment ofits bodycarries a pair of appendages D. its bodyis covered with an exoskeleton made of chitin.
- The hypha of Rhizopus is said to be coenocytic because it
A does not contain chlorophyll B. has no cross walls C. is vacuolated D. stores oil globules.
- In most true ferns sporangia are grouped into A. indusium B. fondsC. prothalli D. sari.
- In the reproduction of mosses, water is essential because A. they live in moist habitats B. they cannot reproduce without water C. the male gametes must swim to fertilize the ovum D. they
produce spores.
- In tapeworm, the two structures that run through the length of the body are the
- nerve cord and the excretory duct B. sperm duct and the nervecord C. genital pore and the excretory duct D. spermduct and thegenital pore.
- Which ofthefollowingisNOTa characteristicofsnails? A. Bilaleral symmetry B. Chitinousexoskeleton
- Muscular foot D. Soft unsegmented body in a mantle.
- In the life history of a butterfly, destruction of crops is caused by the
- maggot B. nymph C. caterpillar D. pupa.
- The correct sequence of tissues in the anatomy of a young dicotlydonous stem from the inside to the outside is
- pith, phloem, cambium, xylem, parenchyma,
collencyma and epidermis B. xylem, phloem,
cambium, cortex, endodermis, collenchyma and
epidermis C. pith, xylem, cambium, phloem,
collenchyma,parenchyma andepidermis
- phloem, xylem, cambium, cortex, endodermis,
collenchyma and epidermis.
- Secondary thickening is initiated in a dicotyledonous stem by the
- xylem parenchyma B. secondary phloem C. endodermis D. cambium.
- One cubic centimeter of lymph isricher than an equal volume of blood
- erythrocytes B. leucocytes C. amino acid
- glucose.
- The oxidative part of the respiration process takes place in the
- mitochondria B. ribosomes C. endoplasmic reticulum D. golgilbodies.
- Fatigue of leg muscles may occur after ridingmany kilometers on a bicycle because of
- insufficient glucose B. excess carbondioxide C. excess protein D. insufficient oxygen.
- The function of the loop of Henle is to A.increase theflow of urine B. concentrate amino acids in the kidney tissue C. concentrates sodium
chlorideinthemedullaofthekidney
- increasethe volume of urine.
Usethe informationinthegraphbelowto
answerquestion25 and26
- Which of the plants is likely to have broad leaves with thin cuticle?
- B.S C.T D.U
- In demonstrating the importance of mineral elements in 26. Which of the plants islikely to be a desertspecies? the plants, the culture bottle must be darkened to A. U B.T C.S D. R. A. prevent algal growth in culture solution
- allowroot growth C. prevent breakdown of mineral elements D. prevent photosynthesis in the root.
- The vitamin which isimportant in the formation of the retina pigmentsis
- vitaminA B. vitamin B C. vitaminC D. vitamin D.
- Which of the following lists of organs is directly involved in nutrition?
- Oesophagus, bronchus, stomach, pancreas and anus B. Spleen, pharynx, duodenum, jejunum and rectum, C. Teeth, oesophagus, ileum lungs and
largeintestine, D. Salivarygland, liver, stomach, villi andcolon.
- In the standard experiment to show that oxygen is given off during photosynthesis, sodium
bicarbonate is used to
- neutralize theacidin waterB.supplymineralsaltsto water plant, C. supply carbondioxide for
photosynthesis D. Kill micro-organism in water.
- Sclerenchyma cells are lignified to
- strengthen and support the plant B. transport synthesized food C. conduct water and salt
- protect the plant from injury.
- The pineapple fruit is best described as A. aggregate, succulent and indehiscent
- aggregate, succulent and indehiscent
- multiple, succulent and indehiscent
- multiple, succulent and dehiscent.
- The flower shown above is
A.complete,regular,hermaphroditic withinferiorovary B.incomplete,regular,staminatewithinferiorovary C.complete regular,hermaphroditicwithinferiorovary D.incomplete,irregular,pistillatewithsuperiorovary.
- A flower showing radial symmetry issaid to be A. pentamerous B. protandrous C. protogynous D. actinomorphic.
- A samara differs from a cypsela by having A. an exended pericarp B. a hard pericarp
- a pericarp fused with the seed coat
- some hairy outgrowths on the pericarp.
- The plantain reproduces asexually by A. suckers B. buds C. fragments D. spores.
- Growth can best be determined in a population of Spirogyra by measuring the
- total lengths of the filaments B. total widths of the filaments C. rate of photosynthesis in the population D. dry weight of the organism.
- Most cells in higher animals retain their power of divisionEXCEPT
- lymphocytes B. nerve cells C. malpighiancells D. germ cells.
- A severe deficiency of thyroxin results in A. diabetes mellitus B. sexual underdevelopment C. cretinism D. gigantism.
- The growth of a coleoptile towards unilateral light source is due to
- rapid rate of photosynthesis B. unequal distribution of auxin C. the effect of geotropism D. the effect of photolysis.
- The sequenceof ear ossiclesfrom the fenestraovalisis A.malleus, incus and stapes B. malleus, stapes and incus C.stapes,incus andmallcusD.stapes,malleus andincus.
- The centre for controlling body temperature in the brain isthe
- cerebrum B. cerebellum C. medulla
- hypothalamus.
- Unlike auxins,gibberellins
- induce the formation of adventitious roots B. do not affect leaf and fruit abscission
- cannot stimulate stem elongation
- are quite effective asherbicides.
- A gene which expresses itself only in the homozygous condition is
- a mutant B. dominant C. recessive D. lethal.
- An example ofmonohybrid inheritance in man is A. astigmatism B. cretinism C. hyperthyroidism D. albinism.
- If a plant, homozygous for round and yellow (RR;YY), is crossed with a wrinkled green type (rr;yy) all of the resulting seed will be
- blue and wrinkled B. round andyellow
- wrinkled and yellow D. round and greenish-yellow.
- The ratio of carriers to sicklers in the F1 generation derived from a parental cross of two carriers of haemoglobin S gene is
A.3:1 B.1:3 C.2:1 D.1:2
- In which of the following crosses will all the female offspring be colourblind?
- colour blind mother x colour blind father.
- colour blind mother x normal father
- carrier mother x colour blind father.
D carrier mother x normal father.
- Which of the following relates to edaphic factors? A. The structure of the earth’s surface B. The influence of living organisms on each other.
- Temperature, rainfall and humidity
- The influence of soils on plants and animals.
- Epiphytes growing on the branches of trees provide an example of the relationship known as A. parasitism B. commensalisms C. aprophytism D. holophytism.
- Poliomyelitis is an infectious disease caused by A. virus B. protozoan C. bacterium D. fungus.
48 One ofthe functions of UNICEF is to A. prevent and control major diseases B. prevent disease outbreak by administering vaccines
- improve the health and nutrition of children and nursing mothers D. monitor environment pollution.
.
- Nitrifying bacteria are important because they A. release nitrogen tothe atmosphere B. convert Atmosphere nitrogen to ammonia C. combine
ammoniawith nitrogenD.oxidizeammoniumsaltsto nitrates.
- The process by which lime is added to clay soilsis known as
- sedimentation B. flocculation C.leaching D.manuring
- The function of ribosomes in cellsis A. protein synthesis B. starch synthesis C. transport of materials D. lipid storage.
Biology 1988
- Which stage isfound in themuscleof an infected pig?
- 3 B.4 C.5 D.6
- The long and coiled intestine of a young tadpole is
- Which of the following structures is common to Euglena, white blood cell and Amoeba?
- Vacuole B. Cell wall C. Cilia D. Cell membrane.
- The term ‘Thallophyta’ refersto
- ferns and mosses B. algae and fungi C. mosses and liverworts D. fungi and ferns.
- The following organisms arehermaphroditesEXCEPT A. snail B. taenia C. schistosoma D. earthworm.
- Parasitic forms are NOT found among
- platyhelminthes B. nematodes C. moluscs
- annelids.
- Which of the following sets of organism represents the correct trend from simple to complex structural organization? 1 Mollusca 2 Platyhelminthes 3
Nematoda 4 Protozoa
- 4 1 2 3 B. 4 3 2 1
- 4 2 1 3 D. 4 2 3 1.
- Spirogyra, Euglena and Chlamydomonas share many characteristics EXCEPT
- nutrition B. reproduction C. mobility
- irritability.
- The prothallus of a fern is equivalent to the gemaetophyte generation of a moss because it
- is inconspicuous B. has rhizoids C. bears sexual organs D. ismulticellular.
- What is the function of trichocyst in Paramecium? A. Movement B. Defence C. Excretion D. Reproduction.
Use the diagram below to answer quetions 10 and 11 10. At which stage in this cycle can man be infected? A. 2 B.4 C.5 D.6.
an adaptation to its
- herbivorous diet B. carnivorous diet C. aquatic habitat D. insectivorous habit.
- Lung hooks are used for respiration in
- spiders B. insects C. millipedes D. snails.
- Insects and millipede have many features in common EXCEPT
- exoskeleton B. jointed, appendages
- Compound eyes D. segmented body
- The major function of the swim-bladder in fishesis A. breathing B. buoyancy C. swimming D. diving
- Which of the following statement gives the BEST description of bark?
- Tissues outside the vascular cambium
- Cork-like tissues found only in stems C. Brown tissues never found in primary growth
- Cork-like tissues of old trees.
- In the transverse section of the leaf of maize vascular bundles are arrangedin
- a row B. one circle C. alternate positions D. two circles.
- If an animal has diastema, it would NOT possess A. incisors B. cannines C. premolars D. molars
- If the gall bladder of a mammal is damaged, which of the following will be most seriouslyaffected?
- Glycolysis B. Digestion of starch C. Digestion of fats and oils D. Digestion of proteins.
- Which of the following will be first digested if ingested at the same time?
- Cooked beans B. Cooked rice C. Cod liver oil D. Roasted beef.
- If the phloem of a healthy plant is killed by heat treatment the
- upward movement of salts will cease B. food manufacture in the leaves will accumulate C. whole plant will die immediately D. leaves of the plant will become yellow.
- In the mammalian respiratory system, exchangeof gases occurs in the
- lungs B. bronchi C. bronchioles D. alveoli.
- The main waste products formed in plant are A. alkaloids, tannins and resins B. water, alkaloids and carbondioxide C. water, carbondioxide and oxygen.
- In the kidney the malpighian corpuscle is located in the
A medulla B. helium C. cortex D. pelvis.
- The skin, through the sweat glads, functions as A an excretory organ B. a respiratory organ C. a sensory organ D. a protective organ.
- Parenchyma cells serve as supporting tissue when they A. contain chloroplasts B. have crystals C. become flaccid D. becometurgid.
- Taxism differs from tropismbecause
- the whole organism is affected B. it is a directional movement C. it is a response to multi-directional stimuli D. part of the organism is affected.
- A dry dehiscent fruit which breaks up into one seeded parts is a
- schizocarp B. capsule C. follicle D.legume.
- Airspaces are characteristic ofseeds or fruits dispersed A. birds B. water C. wind D. explosivemechanism.
- In vegetative propagation, which of the following requires part of another plant to develop?
- Scion B. Bulb C. Rhizome D. Sucker
- Which of these plant groups are normally propagated by asexual means?
A Banana, yam, pineapple and cassava B. Yam, cassava , rubber and banana C. Yam, cassava,
orange and banana, D. Banana, cassava, coffee and pineapple.
- In a mammal, the placenta performs functionssimilar to those of the
A.lungs, kidneys and digestive system B. lungs, heart and nervous system C. liver, intestines and reproductive system D. intestines, heart and
digestive system.
- The radicle of a bean seedling grows most rapidly in the region
- of the root tip B. just above the root tip C. just around the root tip D. just below the root tip.
- The main function of the choroid is
- protection of the eye ball B. transmission of light C. supply of nutrients to tissues of the eye
- converging light.
- What part of the central nervous system is concerned with answering an examination question? A. Cerebrum B. Cerebellum C. Medulla oblongata D. Spinal cord.
- Ifa dark-skinned woman (Bb) marries an albino man (bb) and they have four children, how many of the children will be dark-skinned?
- 3 B. 2 C.1 D.0.
- A red – coloured flower when crossed with a white coloured one produced pink flowers. This is an example of
- complete dominance B. blending inheritance C. interaction of genes D. back crossing.
- The turbidity of a pond can be measured using the A. anaemometer B. secchi disc C. theodolite
- hydrometer.
- The most important substances necessary for the maintenance of life are carbon , oxygen
A.hydrogen , soil and enzymes B. hydrogen, salt and water C. nitrogen, salt and soil
- nitrogen, salt and water.
- If an organism obtains its food by means of haustoria, it is said to be
- holophytic B. heterophytic C. Saprophytic
- Parasitic.
- Which of the following relationship involves only one organism?
- Saprophytism B. Commensalism C. Parasitism D. Symbiosis.
- Which of the following has the greatest influence on the distribution of animals in marine and fresh water habitats?
- pH. B. Salinity C. Water current D. Turbidity
- Which of these groups of animals is likely to be found in fresh water?
- Blood worm, pond skater and scorpion B. Blood worm, pond skater and dragonfly larva C. Pond skates scorpion and dragonfly larva. D. Pondskater, blood worm andant-lion.
- Oneofthe characteristicsofplant in the savanna isthe A.possession of thin, smooth barks B. possession of large tap roots C. production of seedlings on mother plant D. possession of thick, flaky barks.
- Which of the following disease can be contracted areas with fast flowing rivers?
- Schistosomiasis B. Elephantiasis C. Syphilis D. Onchocerciasis.
- Which of the following causes pollution? A.Consumption of canned drinks. B. The addition of fertilizer to farmland C. Respiration of living
organisms D. Burning ofrefuse.
- The mineral nutrient that is most bound to the soil is A. phosphorus B. calcium C. iron D. potassium.
- The mineral nutrient that easily gets leached out of the soil is
- phosphorus B. calcium C. magnesium D.nitrate.
- Most commercial fertilizers are rich in salts of A.Sodium,iron andcalcium B. nitrogen,phosphorusand potassium C. iron, copper and nitrogen D. calcium, sodium and phosphorus.
- Dead plants and animals are decomposed by bacteria and fungi into
- butterfly B. grasshopper C. mosquito D.housefly.
Use the figure below to answer questions 1 to 3
- The structure labelled 5 isthe
Biology 1989
- Which of the following is a common characteristic of crustaceans?
- Possession of a pair of antennae
- Possession of two pairs of antennae.
C Each segmenthas apair ofwalkinglegs
- Four pairsofwalking legson the
cephalothorax.
- The pedipalpi in spiders are usedfor
- grasping B.Walking C. feeling D. Web spinning.
- The body of a snail is divided into head
- thorax and abdomen B. visceral massand
- neucleolus B. Golgi body C. mitochondrion vacuole
- Which of the labelled parts of the cell contains ribonucleic acid?
- 1 B. 2 C.3 D.5
- Which structure is known as the power house of the cell?
- 6 B.5 C.4 D. 3
- When a virus is placed in a non-living medium it A. becomes dehydrated B. forms spores
- forms flagella D. becomes crystallized.
- A characteristic of the phylum coelenterate is that A. most of them are marine B. they possess a gut with a single opening C. they possess
numerous pores on their body D. they are
bilaterally symmetrical.
- A multinucleate body without internal cell boundaries is characteristic of
- bryophytes B. fungi C. algae D. gymnosperms.
- Double fertilization is a unique feature of A. angiosperms B. bryophytes C. pteridophytes D. algae.
- Which of the following phyla have members with both internal and externalsegmentation?
- Platyhelminthes B. Nematoda C. Algae
- Mollusca
- Mineral salts can be absorbed into the roots by A. osmosis only B. osmosis and diffusion
- diffusion and active transport D. imbibition only.
abdomen C. thorax and foot D. visceral mass and foot.
Use the diagram below to answer questions 13 to 14
- Which of the labelled parts is used for feeling? A.1 B.2 C.3 D.4
- The structure labelled 2 is the
- compound eye B. ocellus C. antenna D. labialpalp.
- In a dicotyledonous stem, each companiosn cells is found beside the
- endodermal cell B. xylem vessel
- sieve tube D. pericyclicfibre.
Use the diagram below to answer questions 16 to 17 16. Which of the structure’s is the molar?
A.1 B.2 C.3 D.4
- What is the function of 3?
- Cutting off large pieces offood.
- Seizure and tearing of prey
- Grinding of food D. Tearing of flesh only
- If a healthy potted plant is continuously kept in dim oflight
A.the rate of respiration may equal that of
photosynthesis B. more carbon dioxide and
water are taken in C. respiration may behalted D. the volume of oxygen released increases.
- The pancreatic juice contains the enzymes amylopsin,
- pepsin and trypsinogen B. rennin and
steapsin C. steapsin and trysinogen
- steapsin and ptyalin.
- Aged erythrocytes are destroyed in the A. pancreas B. liver C. lymph nodes D. kidney.
- The seedlings in a rice field were found to have thin lanky growth with reddish leaves and poor root development. This is because the soil lacks A. sulphur B. phosphorus C. potassium D.iron.
- There will be agglutination when the
- GroupA serummixeswithGroupAerythrocytes B. Group A serum mixes with Group Berythrocytes C. Group ABserummixeswithGroupOerythrocytes D. Group B serum mixes with Group B erythrocytes.
Use the figure below to answer questions 24 to 26
- Which of the following is the function of lymph? A. Carries hormones round the body B. Transport nutrient and oxygen from blood, capillariesto
the cells. C. Distributes heat uniformly round
the body D. Conveys aminoacids and glucose from the small intestine to the liver.
- The type of joint at the point labelled 5 isthe A. pivot joint B. gliding joint C. ball and socket D. hinge joint.
- Which of the labelled bones is the ulna? A. 1 B.3 C.4 D.5
- What is the nameof the structure labelled 2? A. Odontoid process B. Olecranon B. Process C. Patella D. Condyle.
- Thelumbar vertebra when compared with a thoracic vertebra has a
- longer neural spine B. wider neural canal
- thicker centrum D. shorter transverse process.
- Wind-pollinated flowers usually have A. rough pollen grains B. stickystigmas C. small and short stigmas D. long styles.
- The components of castor oil seed and the maize grain are similar EXCEPT forthe
- number of cotyledons B. location of the embryo
- number of radicles D. number of plumules.
- A corm differsfrom a bulb in that
- its stem is the main food storage organ
- it has a flattened disc-shaped stem
- buds are absent in the axils of the leaves
- adventitious roots are present
- Exponential increase in the population of an organism is a characteristic feature of
- binary fission B. sexualreproduction
- budding D. vegetative propagation.
- The irreversible life process by which new protoplasm is added to increase the size and weight of an organism can be termed
- anabolism B. catabolism C. growth
- development.
- Fruit enlargement can be induced by spraying young ovary with
- cytokinin, abscisic acid and ethylene
- gibberellin, ethylene and abscisicacid
- auxin, abscisic acid and ethylene
- auxin, cytokinin and gibberellin.
- A fundamental similarity between nervous and hormonal system is that both
- involve chemical transmission B. have
widespread effects C. shed chemicals into the blood stream D. evoke rapid responses.
- The region that controls most of the unconscious processes of a mammalian bodyis the
- cerebellum B. cerebrum C. spinal cord
- medulla oblongata.
- During cell division,the two strands of chromosomes arejoinedat apointcalled
- spindle B. chromatid C. centromere D. aster.
- When the two alleles present in an organism are of the same type, the genotype is described as A. heterozygous B. heterogamous C. homozygous D. homologous.
- If parents with blood groups AB and OO produce six children
- three of them will have groupB
- two of them will have group A
- all the offspring will h ave group O
- none ofthem will have group A.
- Which of the following is a sex-linked character? A. Sickle-cellanaemia B.Tonguerolling C.Skincolour D. Colour blindness
- In an ecosystem, the LEAST efficientenergy transfer link isfrom
- producers to primary consumers B. sun to producers C. primary consumers to secondary consumers D secondary consumers to
decomposers.
- Lichen is an example of
- a saprophytic organism B. a symbiotic
association C. an epiphytic plant
- a carnivorous plants.
- A physiological adaptation of plants to the problem of excessive water loss is
- reduction in the number of stomata
- reversal of the normal stomatal rhythm
- possession of shallow roots
- possession of waxy cuticle.
- Which of the ways of controlling bilharzia can result in pollution?
A Clearing water weeds on which the snails feed. B. Treatinginfectedpeoplewith drugs
- Preventing contamination of water by infected
urineand faeces D. Applyingchemical tokillthe
snails.
- Which of the following diseases can be caused by a bacterium?
- ringworm B. poliomyelitisC. malaria D. syphilis.
- Which of the following is a dangerous product of coal buming?
- sulphur dioxide B. carbondioxide C. carbon D. nitrogen.
- 5g of oven dried soil was heated in a furnace for 24hours, after cooling, it weighed 4.8g what is the amount of humus in the soil?
- 40.0g per 100g dry soil B.4.4g per 100g dry soil C. 4.0g per 100g dry soil D. 0.4g per 100g dry soil.
- Most irrigated lands often become unproductive in later years because of
- loss of fertility B. increase in salinity C. soil erosion D. loss ofwater
- Farmers practices crop rotation because it A. helps to prevent soil erosion B. allows two crops to be planted at the same time
- helps to conserve soil fertility
- is an alternative to shifting cultivation
- In which of the habitant will the plants show xeromorphic features most prominently?
A.X B.R C.P D.Q
- Which ecological factor exerts the greatest influence on the structure of the profiles?
- topographic B. edaphic C. biotic D.climatic.
Biology 1990
- Viruses are considered to be living organisms because they
- possesstransmittable characters B. movefrom one place to another C. respond to stimulation
- ingest food materials
- Which ofthefollowing characteristicsis common to Amoeba and Paramecium?
- Oral groove B. Trichoyst C. Contractile vacuole D. Cilia
- Hydra removes undigested food by
- passing it through the anus B. passing it through the mouth C. means of a contractile vacuole
- egesting it through the body surface.
- Which of the following groups of invertebrates reproduces by budding
- Arthropoda B. Annelida C. Mollusca D. Coelenterata.
- The algae, bryophytes and pteriodophytes are similar in thatthey
- are sea weeds B. have no vascular tissues C. require moisture for fertilization
- are microscopic plants.
- The spores of ferns are dispersed by A. wind B. water C. insects D. explosive
mechanism.
- In bryophytes, sex organs are produced in the A. gametophyte B. rhizoidC. protonema
- sporophyte
Use the figure below to answer questions 8 and 9
- The part labelled 3 isthe
A.leafscarB.lenticel C. auxiliary bud D.girdlescar
- Which part of the twig produces auxins? A.4 B.3 C.2 D.1
- Which of the following animals has homodont dentition?
- Rat B. Man C. Lizard D. Pigeon.
- In which of the following does external fertilization take place?
- Toad B. Lizard C.Bird D.Cockroach.
- In the tapeworm, the suckers on the scolex are used for
- sucking the blood of the host B. holding fast to the host C. reproduction D. locomotion
- A feature which adapts birds to flight is the possession of
- scally legs B. light bones C. two walking legs D. a pointed beak.
- The nephridia in the earthworm form part ofthe A. reproductive system B. respiratory system. C circulatory system D. excretory system.
- Which of the following diseases is rarely spread by a housefly?
- Yellow fever B. Dysentery C. Typhoid fever D. Poliomyelitis
- Which of the following cellsis thin-walled and living atmaturity?
- Collenchyma B. Sieve tube C. Xylem vessel D. Sclerenchyma.
- The mode of nutrition in which digestion is extracelluar is
- holophytic B. parasitic C. holozoic
- saprophytic.
- The first step in the process of photosynthesis is the A. activation ofthe chlorophyll B. photolysis ofwater C. reduction of carbondioxide D. formation ofsugar.
- Which of the following food substances will produce a brick-red colour when warmed with Benedicts’ssolution A. Glucose B. Starch C. Egg white D. Maltose.
- The organ which secretes digestive enzymes as well as hormone is the
- liver B. salivary gland C. pancreas D. spleen.
- The villus in the small intestine is significant because it A. increases the surface area for absorption
- increases the surface area for digestion C. assists in mixing digested food D. assists in filtering
undigested food.
- If a ring of bark and phloem isremoved from a stem, the A. plant dies immediately B. plant dies after twodays C. movement of food is not affected D. movement of mineral salts is hardly affected.
- Transpiration can be measured witha
- photometer B. hygrometer C.potometer
- barometer.
- Excretory products responsible for the red, purple and blue colours of flowers are called
- alkaloids B. tannims C. anthocyanins D. resins.
- Etiolation is caused by the influence of A. mineral salts B. water C. carbondioxide D. light.
- Muscles are indirectly attached to bones by means of A. ligaments B. membranes C. tendons D. sultures.
Use the figure below to answer questions 27 and 28. 27. Which structure is the glomerulus? A. 5 B.3 C. 2 D.1.
- Ifthebloodistooconcentrated,more wateris absorbedfrom A. 5 B.4C.3 D.1
- During mammalian embryo development, large amount of oestrogen and progesterone are produced in the A. umbilical cordB. amnionC. placenta D. amnioticfluid.
The type of placentation shown in the figure above is A. parietal B. marginal C. axile D. free-central.
What stage during cell division is represented in the figure above
- prophase B. metaphase C. anaphase D. telophase
- Fruitswhich developwithoutfertilization aredescribedas A. simpleB. pathenocarpic C. aggregate D. compound
- The elephant grass is propagated vegetatively by means of
- corms B. bulbs C. suckers D. solons.
Use the figure below to answer questions 27 and 28. 33. All the cell bodies in the spinal cord are found in A.1 B.2 C.3 D.4
- In a reflex action, impulse flowsfrom
- 1 to 2 B. 2 to 1 C. 4 to 1 D. 4 to 2
- The part ofthe ear that is concerned with balance isthe A.semi-cirularcanalsB.incusC.malleusD.Bastachiantube.
- In an organismwherethe2ndnumber ofchromosomes is16, thenumberofchromosomesin each gametewillbe A. 32 B.16 C.8 D.4
- What would be the result of the first filial generation (F1) and the second filial generation (F2) of a mono hydrid cross between pure line normal-winged Disophila? flies and pure line short- winged flies ofthe gene for the normal wing is dominant?
- F1 fliesallshort–wingedandF2flies all normal–winged. B. F1 fliesallnormal–winged andF2fliesallshort-winged. C. F1 flies all short-winged and three-quarters of F2 flies are short-winged
D.F1flies all normal –winged and three –quarters of F2 flies are normal–winged.
- An individual in the AB blood group isa universal recipient for blood conation because
- all the red blood cells do not carryantigen
- all the red blood cells carry antigen A
- all the red blood cell carry antigenB
- there arenoanti-Aandanti-Bantibodiesin theserum.
- Haemophilia results from the mutation of the genes A. in the sex chromosomes B. which control skincolour C. which control the mechanism for blood –clotting D. which control the formation of haemoglobin.
- In a savanna ecosystem, the abiotic factors include A. legumes, temperature and sandy soil
B.water, temperature and soil C. minerals, oxygen and reptile D. water, soil andgrasses.
Use the figure below to answer questions 42 and 43.
- Which organism is anomnivore?
- Praying mantis B. Hawk C. Mouse D. Grasshopper.
- Which ofthe organims will have the lowest population in an ecosystem?
- Hawk. B. Cowpea C. Praying mantis D. Mouse.
- The salinity of a brackish environment.
- increases immediately after rain B. increases at the end of the rainy season C. decreases with increase in micro-organisms D.increasesduringthe dryseason.
- Physiological adaptation to very dry condition in animals is called
- hibernation B. aestivation C. rejuvenation D. xeromophism
- Which set of diseases is spread mainlyby insect vectors? A. cholera, tenia and gonorrhoea. B. poliomyelitis, tuberculosis and sypillis. C. cholera, malaria and tuberculosis D. malaria, cholera and river blindness.
- Which of the following constitutes pollution? A. Droppings from birds B. Loud discomusic
- A pack of cigarettes D. Refuse in an incinerator.
- An acidic soil can be improved upon by A. Sedimentation B. Leaching C. Flocculation
- Watering.
- What dobacteriain rootnodules derivefromthehostplant? A. Protection and minerals B. Water andminerals. C. Carbohydrates and water D. Protection and
carbohydrates.
- Free nitrogen is released to the atmosphere by A. nitrogen fixing bacteria B. nitrifying bacteria C. denitrifying bacteria D. saprophytic bacteria.
Biology 1991
Use the figure below to answer questions 1 and 2. 1. Which of the following structures is associated with aerobic respiration?
A.1 B.2 C.3 D.4
- The structure labelled 5 is usedfor
- protein synthesis B. energy production
- secretion D. excretion.
- Angiosperms and gymnosperms belong to the plant group known as
- schizophyta B. bryophyta C. pteridopyta
- spermatophyta.
4 Which of the following are non-green plants? A Euglena B. Fungi C. Spirogyra D. Angiosperms.
5 Sting cells are normally found in
- flatworms B. hydra C. snails D. paramecium.
6 Which of thefollowing are differentiated into true roots, stems and leaves?
- Algae B. Schizophyta C. Pteridophyta
- Bryophyta
- To facilitate gaseous exchange, breathing roots have A. tomata B. mitochondria C. cuticle D. lenticels.
8 The annulus of fern sporangium helpsin A. spore dispersal B. conduction of mineralsalt C. trapping of light energy D. water retention.
9 One of the features which adopts paramecium to its environment is the possession of
- a regular shape B. two nuclei C. cilia D. a pellicle.
10 In the earthworm, the cocoon is secreted by the A. chaeta B. prostomium C.peristomium
- clitellum.
- The function of maxillipeds in crayfish is to aid A. walking B. swimming C. feeding D.respiration.
- The respiratory organ in the land snail is the A. radula B,. mantle C. tentacle D. foot.
Use the figure below to answer questions 13 and 14.
- The structure labelled 4 isfor
- feeding B. attachment C. excretion D. respiration.
- As the tadpoles develops, the structure labelled 5 A. grows longer B. becomes shorter C. becomes the hind legs D. remainsunchanged.
- The gill rakers of fishes take partin
- feeding B. respiration C. swimming D. diffusion.
- A wide pith with a ring of conducting tissue is characteristic of the root of
- sunflower B. maize C. bean D. okra.
- Which ofthe following is formed immediately after the first product of photosynthesis?
A.Lipid B. Starch C. Oxygen D. Sugar
Use the figure below to answer questions 18 and 19.
Dissection showing the Abdominal Cavity of a rat
- In the digestive system, absorption of nutrients into the blood takes places in the part labeled
A.1 B.2 C.3 D.4
- The gland which producestrypsin, amylase and lipase islabelLed
- 6 B.4 C.2 D.1
- One of the accessory organs of the digestive system is the A. kidney B. spleen C. liver D. lung.
- The element common to protein, carbohydrate and lipid is A. hydrogen B. sulphur C. nitrogen D phosphorus.
- The crown of the mammalian tooth is covered with A. cement B. dentine C. caries D. enamel.
- In living cells, insufficient oxygen may cause a breakdown of glucose into
- fatty acids B. lactic acids C. glycogen
. D. carbondioxide.
- Which of the following can bring about the greatest increase in the rate of transpiration?
- Increased humidity B. Reduced temperature C. Reduced wind speed D. Reduced humidity.
Use the figure below to answer questions 25 and 26. 25. After 30 minutes, the level of sugar solution the above figurewill
A.rise in X only B. rise in Y only C. be the same in X and Y D. fall inY.
- The process bywhich water movesfrom X to Y through the semi-permeablemembrane is called
- diffusion B. osmosis C. active diffusion
- osmoregulation.
- Fibriongen and prothrombin play important rolesin the A. deamination of proteins B. clotting ofblood
- detoxication of substances D. storage of vitamins.
- Deoxygenated blood flows into the right and left lungs through the
- pulmonary vein B. vena cava C. pulmonary artery D. subclavian vein .
- Which of the following is a plant excretory product? A. Oil B. Cytokinin C. Resin D. Amino acids.
- The movement of the whole organism to an external stimulus istermed
- tropism B. a taxisC. a nastic movement
- a phototrophic movement.
- Which of the following vertebrate lays a centrum? A. Atlas B. Axis C. Thoracic D. Lumbar
- The function of the epididymisin mammals isthe A. expulsion of urine B. storage ofsperms
- circulation of blood D. activation of sperms.
- A collection of achenesformed from several carpels of a flower is
- a multiple fruit B. an aggregate fruit
- a schizocarp D. a simple fruit.
- Vegetative propagation is described as asexual reproduction because
A.reproductive organs are not involved B. new individuals are not formed C. many new plants are produced D. there is no exchange of genetic
materials.
- Epigeal germination can be found in
- sorghum B. maizeC. millet D. groundnut.
- A dwarf plant can be stimulated to grow to normal height by the application of
- thyroxin B. gibberellin C. insulin D. kinin.
- The greatest contribution to genetic studies was made by A. Thomas Morgan B. GregorMendel
- Charles Darwin D. Robert Hooke.
- The exchange of genes between homologous chromosomes is called
- test cross B. back cross C. crossing –over
- mutation.
- When two heterozygotes mate, the dominant trait will appear in
- the F1generation only B. the F2 generation only C. both the F1 andF2generations D. neither the F1nor F2generation.
- Which of the following characters is NOT sex-linked? A. River blindness B. Baldness.
- Haemophilia D. Colour Blindness
- The most important factors which influence an organism’s way of life in its habitat are
A.the physical and biotic environment B. food and water availability C. temperature, water, light and predator- prey relationship D. competition for food and space.
- Organisms in an ecosystem are usually grouped according to their tropic levelas
- carnivores and epiphytes B. consumers and parasites C. producers and consumers D. producers and saprophytes.
- The above diagram represents a competitive interaction between organisms in communities I and II. Which ofthe following statement is CORRECT?
- The population of I was higher than II at the beginning of the experiment. B. II was wiped out from the environment at the end of the experiment.
- The population of II was always lower than that ofI D. The population of I was lower at the end of the experiment than at the beginning.
- A food web is more stable than a food chain because. A. it contains more organisms B. it has greater energy source C. it is not easy to destroy D. every organism has an alternative food source.
- Which ofthe following is likely to occur in a deciduous forest during the dry season?
- New leaves are formed B . The trees dieoff.
- The undergrowth increases D. The ground
becomes bare.
- Which ofthese isNOTan adaptive featurefor arboreal life? A. Possession of a long tail B. Possession of claws C. Possession of teeth D. Counter shading in coat colour.
- Which of the following diseases can be prevented by innoculation?
- Symphilis B. Malaria fever C. Tuberculosis
- Acquired immuned Deficiency Syndrome.
- Sources of air pollutants are
- industrial chimneys, burning fossil oils and river dams B. sulphur dioxide, acid rain and pesticides C. sulphur mines, vehicle exhausts and aerosols D. sewage, smoke and old vehicles.
- Fertilizers are lost from the soil through A. sheet erosion and evaporation B. leaching,
underground seepages and run-off
- sheet erosion, gully erosion and wind erosion D. wind erosion and heavyrainfall.
- Nitrogen –fixing micro-organisms in leguminous plants live symbiotically inthe
- root nodules B. tap roots C. branch roots
- root hairs.
Biology 1992
- The organelle involved in tissue respiration is the A. endoplasmic reticulum B. ribosome C. golgi body D. mitochondrion.
- A tissue can best be defined as.
A.an aggregate ofsimilar cells B. an aggregate of cells performing a similar function C. an aggregate of similar cells performing the same function
- a mixtureofdifferentcell typesperforming thesamefunction.
- Which of the following correctlysummarizes the life cycle of a fern plant?
- Spore prothallus thalluss porangium. B. Male and femalegamentangia zygospore sporangium
spores. C. Spore thallus spermatozoa +
ovumsporangium D. Prothallus spermatozoid + egg cell leafy plant sporangium spore.
- A major difference between platyhelminthes and coelenterates is that platyhelminthes
- are multicellular B. have developed a mesoderm C. reproduce sexually D. reproduce asexually.
- The essential structural difference between Hydra and tapeworm isthat while Hydra,
- has tentacles, tapeworm isparasitic
- is diploblastic, tapeworm is triploblastic C. has a mouth, tapeworm feeds by suckers
- has mesoderm, tapeworm has mesogloea.
- The flowering period ofplantsin a habitat is determined by the
- duration of sunlight B. intensity and duration of rainfall. C. relative humidity of the atmosphere
- temperature of the habitat.
Use the figure below to answer question 7 and 8.
- The structure labeled X is used by the organism in the same way as man uses his
- oesophagus B. trachea C. stomach D. intestine.
- The structure labelled Y is the
- food vacuole B. nucleolus
- marcronucleus D. contractile vacuole.
- Which of the following insects undergoes incomplete metamorphosis?
- mosquito B. Termite C. Housefly D. Moth.
- An onion is a bulb because it
- has a tuberousstem B. has a reduced stem and thick fleshy leaves C. has adventitious roots D. bears many buds at the nodes.
- The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
- stomata B. lenticels C. air spaces D. guard cells.
- Fungi are heterotrophic because they
- have no leaves B. lack roots C. are filamentous D. lack of chlorophyll.
- The major site of photosynthesis in the leaf is the A. palisade parenchyma B. mesophyll parenchyma C. upper epidermis D. lower epidermis.
- 5cm3 dilute sodium hydroxide solution and 5cm3 one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of
- glucose B. starch C. fat D. protein.
- The blood vessel which carries blood from the alimentary canal to the liver isthe
- hepatic arteryB. hepatic vein C. hepatic portal vein D. mesenteric artery.
- Gaseous exchange in Aves occurs in the A. tracheoles B. bronchi C. air sacs D. trachea.
- In the absence of oxygen, the pyruvic acid produced during glycolysis is converted to Co2and
- water B glycerol C. ethanol D. citric acid.
- The excretory organ in insect isthe
- kidneyB. malpighian tubule C. flame cell
- nephirdium.
Use the figure below to answer questions19 and 20.
- The structure labelled 5 is the
- sweat gland B. sebaceous gland C. blood vessel D. nerve fibre.
- Melanin and kerantin are produced in the part labelled A.2 B.3 C.4 D5.
- Theboneoftheneckonwhich theskullrestsisknownasthe A. odontoid process B. axis C. atlas D. occipitalcondyle.
- Which enzymes are contained in the pancreatic juice? A. Ptyalin, lipase and pepsin B. Maltase, erepsin and trypsin. C. Rennin, surcrase and lipase D.Amylase., lipase and trypsin.
Use the figure below to answer questions 23 and 24.
- The part labeled 3 isthe
- cartilage B. ligament C. synovial fluid D. bone.
- The function of the part labeled 1 isto
A.secrete a fluid which lubricates the joint B. attach muscles to the bones at the joint C. bend the bones
atthejoint D.holdthe jointin place.
- Double fertilization in higher plant is significant because it ensures the
A.formation of a fertile embryo B. formation of a fertile embryo and the endosperm C. development of the seed D. development ofthefruit.
- Inmammaliandevelopment,thefunctionoftheyolkisto A. supply nutrients to the embryo B. acts as the shock absorber to the foetus C. supply air to the embryo D. facilitate the process of excretion in the foetus.
- Hydrogeal germination scharacterized bythe A. emergence of the plumule out of theground
- provision of nourishment by the endosperm
- elongation of the hypocotyl
- elongation of the epicotyl.
- Fruitswhich developwithoutfertilization oftheovuleare A. false B. multiple C. aggregate D. parthenocarpic.
Use the figure below to answer question 29 and 30
- Which part ofthe curverepresentsthefastestrateofgrowth? A. K B.L C.M. D.N.
- The grand period of growth is represented by A. N B. M C.L. D. K.
- Neurons that receive stimuli from the body or internal organs are called
- sensory neurons B. efferentneurons
C.motorneurons D.relayneurons.
- Which of the following istrue of a climax community? A. It persists until the environment or climate changes. B. It changes drastically from one year to the next C. It is the first stage in succession. D. It is made up of the tallest trees and the smallestanimals.
- A population is defined as a collection ofsimilar organismsthat
- behave in the same way B. interbreedfreely
- are found in the same habitat D. eat the same food.
- In typical predator food chain involving secondary and tertiary consumers, the organisms becomeprogressively A. smaller andmorenumerousalongthefoodchain
- equalin number andsizealongthefoodchain
- larger and fewer along the food chain D.parasitized along the food chain as consumers get bigger.
Use the figure below to answer questions 35 and 36.
- Which level of thepyramid hastheleasttotalstoredenergy? A. E B. F C.G D. H.
- Which organism in the pyramid functions as a tertiary consumer?
- Algae. B. Shark. C. Tadpole. D. Tilapia.
- Mangrove swamp can be found
- on a sea shore with flat terrain B. where a river meets the sea C. on a mud flat near the sea.
- where two rivers meet.
- Soil with the finest particles is called
- silt B. clay C. sand D. gravel.
- Malaria symptoms are caused by
- toxins released into the blood as a result of the
destruction ofred bloodcells B. themultiplication
ofthe malarial sporozoites in the liver. C. theinvasion of the red blood cells by the trophozoiters
- the development of merozoiters into gametocytes.
- Which of the following is true of the children of a haemophilic man who marries a woman that is not haemophilic and does not carry the trait?
A.All their sons will be haemophilic. B. All their daughter will be haemophilic. C. All their daughters will be carriers. D. All theirssons will be carriers.
- A child with blood group genotype different from those of both parents and with a mother of genotype OO, can only have a father of genotype
A.A B.B C.AB D.OO.
- IfR and r denote the genesfor a character, the offspring of the cross between RR and Rr are
- RR, 2Rr,rr B. 2RR,2rr C. 2RR, 2Rr D. 4Rr.
- A mammal with red fur and long ears was crossed with another having white fur and short ears. If the offspring had red fur and short ears, then the
- characters are linked B. characters are not linked C. parents are related D. parents are not related.
- Pawpawseeds collected from a tree with many desirable agronomic qualities did not give rise to plants of desirable characters as the parent because
- seeds are not reliable for propagating plants
- uncontrolled out-crossing can introduce unwanted variability C. vegetataive propagation is the best form of reproducion for all crops D. seeds were not physiologically mature atharvest.
- Women do not suffer from colour blindness A.because the trait issex-linked B. onlymen are colour blind C. the genes are recessive and sex-linked
- the genes occur on both the X and Y chromosomes.
- The hereditary material of the cellis
- the R N A B. protein C. the DNA D. carbohydrate .
- An example of plant adaptation to a xerophytic environment is represented by the development of A. fleshy tissues and reduced leaves B. broad canopy
and extensive surface root system C. thick barks and broad leaves
- rough leaves and shallow root system.
- Which of the following factors is LEAST likely to affect the animals living in a fresh water habitat? A. Turbidity B. Temperature C. pH. D.Salinity.
- The theory of natural selection was developed by A. Lamarck and Darwin B. Darwin and Wallace C. Wallace and Mendel D. Mendel and Lamarck.
- Fossil records found in sedimentary rocks offer some explanation for the theory of evolution because A. the deposits have remains of organisms
characteristic of when they were formed
- different strata have remains of organisms of the same kind C. only organisms with strong parts are fossilized D. most animals and plant fossilsbear little resemblance to present day living specimens.
Biology 1993
- On whatstructures are the units ofinheritance situated? A. Golgi bodies B. Ribosomes C.Chromosomes
- Endoplasmic reticulum.
- Production of naked seeds is a distinctive feature of the group of plant called?
- grasses B. conifers C. legumes D. palms.
- In which of these features do bryophytes differ from pteridophytes?
- Absence of flower B. Alternation ofgeneration C. Dependence on water for reproduction
- Presence of a vascular system.
- Which of the following organs or cell components are common to both the sporophyte and the gametophyte of a fern?
- Rhizoids B. Roots C. Chloroplasts D. Leaves.
- In which of the following organisms does a single cell perform all the function ofmovement , nutrition, growth, excretion and photosynthesis?
- Paramecium B. EuglenaC. Amoeba. D. Spirogyra.
- In which of the following organisms would glycogen be stored?
- Spirogyra. B. Chlamydomonas. C.Rattus
- Magnifera.
- The most successful group of animals in terms of diversity of species is
- mollusca B. arthropoda C.mammalia
- playthehelminthes.
- Flame cells are the
- excretory system of worms B. excretory and respiratory system of flatworms C. excretory system of flatworms D. excretory system offlatworms.
- The spores of mucus are dispersed by
- water B. wind C. insects D. explosive mechanism.
Use the figures below to answer questions 10 and 11
- Which of the following is the correct order of the development stages?
- 1⓪2⓪3⓪4⓪5 B.
5⓪1⓪3⓪2⓪4C.
2⓪1⓪3⓪4⓪5 D.
5⓪3⓪2⓪1⓪4.
- Stage 3 breathes
A.with the lungs B. with the external gills C. with the internal gills D. through theskin.
- The butterfly is of great economic importance because A. ofitsuse in scientificstudies B. itsucks nectarfrom flowersC. it addsto thebeautyofthe environment
- it pollinates flower of crops and other plants.
- Manufactured food in the plants is transported throughthe A. xylem B. phoem C. cambium D. cortex.
- Interveinal chlorosis is normally associated with the deficiency of
- magnesium B. potassium C. iron D. calcium.
- Osmic acid boiled with a solution of food substance gave a black precipitate . This indicated the presence of A. fats and oils B. proteins C. amino acids D. starch.
- Which of the labeled parts is the diastema? A. 2 B.3 C.4 D. 6.
- The lower jaw is typical of a
- sheep B. rabbit C. dog D. cat.
- The end products of the digestion of fats and oils in mammalsare
- maltose and fatty acids B. amino acids and glucose C. fatty acids and fructose D. fatty acids andglycerin.
Use the diagram below to answer questions 19 and 20
The mammalian heart
- Blood is pumped into the right ventricle bythe contraction of the auricle wallthrough
- 1 B.3 C5 D.6.
- After circulation in the lungs, the blood returns to the left auricle through
- 1 B.4 C.5 D.6
- The main function of blood in mammals is to transport A. excretory materials from tissues B. carbondioxide from lungs to tissues C. digested food from all the body tissues. D. oxygen to the lungs.
- Members of the phylum Protozoa use thecontractile vacuole
- to remove excess food B. formovement
- for digestion D. to remove excesswater.
- The response shown by the tips of the root and shoot of a plant to the stimulus of gravity is
- haptropism B. phototropism C. hydrotropism D. geotropism.
- Which of the following is the correct order of the vertebrae along the spinal column? 4
- Axis atlas thoracic lumbar cervical sacral
- Atlas cervical axis thoracic lumbar sacral. C. Atlas axis cervical thoracic lumbar sacral
- Axis cervical thoracic sacral lumbar.
- Which of the following is TRUE of the process of conjugation in Paramecium?
A.Micronucleus disintegrates. B. Each ex-conjugant divides only once. C. Macronucleus undergoes division D. Each micronucleus divides twice.
- The bright colours of the comb and feathers in the peacock are for
- sex differentiation B. beauty C. courtship
- defence.
- The main function of thepetal of a flower is to A. attract pollination agents. B. protect the flower while still in bud C. serve as landing stage for insects
- protect the inner parts from desiccation.
- In themammal, the automonicnervoussystemconsistsof A. sympathetic and parasympathetic systems.
- brain and spinal nerves C. brain and cranialnerves D. spinal cord and spinal nerves.
Use the diagram below to answer questions 29 and 30
- In H, the cotyledons are carried above the soil because A. the epicotyl grows faster than the hypocotyl
B the hypocotyl grows faster than the epicotyl
- both grow at the same rate
- the epicotyls out grows the radicle.
- The function of the structure labelled G isto A. carry out initial photosynthesis for the seedling B. protect the young leaves from mechanical damage C. protect the young leaves form sunlight.
- protect the young leaves form insect.
- When it is cold, the blood vessels of the skin A.dilate to increase the amount of blood flowing to the skin B. constrict to reduce the amount of blood
flowing to the skin. C. dilate to reduce the amount of blood flowing to the skin D. constrict to increase the amount of blood flowing to theskin.
- Which path does sound entering the human ear follow? A. Oval window ossicles ear drum B. ear drum oval window ossicles. C. Ear drum ossicles oval
window. D. Ossicles ear drum oval window.
- What would happen to a man whose pancreas has been surgically removed?
- The level of blood sugar would increase.
- The glycogen content of the liver would increase. C. His blood pressure would decrease. 4
- His weight would increase appreciably.
- Carnivorous plants are usually found inarea A. which are deficient in nitrate B. which are deficient in oxygen C. with lowpH
- where insects are abundant.
- What is the term used to describe the sum total of biotic and abiotic factors in the environment of the organism?
- Habitat.B. Biome.C. Ecosystem D. Ecological niche.
- Important abiotic factors which affect all plants and animalsin the habitat are
- temperature and turbidityB.rainfall and relative humidity C. salinity and winddirection
- temperature and rainfall.
- The most important physical factor which affects an organism living in the intertidal zone of the seashore is A. pH B. salinityC. wave action D. temperature.
- At which trophic level would the highest accumulation of a non-biodegrable substance occur?
- Primary producers.B.Tertiaryconsumers. C. Primary consumers. D. Secondary consumers.
- Two organisms of different species, living in close association but not dependent on each other are referred to as
- parasites B. commensals C. symbiots D. autorophs .
- Which of the following instruments is NOT used in measuring abiotic factors in any habitat?
- Carbon monoxide poison tissues by
- constricting the blood vessels B. killing the cells C. combining with haemoglobin D. rupturing the blood vessels.
- Which ofthe following is an example ofdiscontinuous variation observed in man?
- Skin colours B. Tongue rolling C. Body weight D. Height.
- Duringbloodtransfusion,agglutinationmayoccurwhen A. Contrasting antigens react with contrasting
antibodies B. Similar antigens reactwith
- two different antigens react with each other
- two different antibodies react with each other. 48.
- MicroscopeB. Thermometer C. Hygrometer D.Wind vane.
- Plants adapted for life in salty marsh are called A. hydrophytes B. xerophytes B. halophytes
- epiphytes.
- Which group plants would be the first colonizers in an ecological succession changing rocks to soil?
A Mosses. B. Ferns C. Lichens D. Grasses.
- Soil fertility can be conserved and renewed by
In the illustration above, the genotypes of the offsprings are
- 1 heterozygous smooth : 2 homozygous smooth: 1 wrinkled B. 1 homozygous smooth : 2 heterozygous smooth 1 wrinkled
- 2 homozygoussmooth : 2 wrinkled
- 3 heterozygous smoo th : 1 wrinkled
- yearly mono cropping B. crop rotation and cover crops C. bush burning to remove unwanted debris D. avoiding artificial manures.
- What ecologicalcondition favorsthebreeding ofblackflies? A. Fresh water habitat B. Water in ponds and swamps C. Water in small containers D. Fast flowing stream.
- Cold blooded animals are referred to as A. poikilothermic B. homoiothermic
- polythermic D. homeostatic
- Which of the organism has lost the pentadactyl limb structure?
- Bat B. Fish C. Frog D. Pigeon.
Biology 1994
- The soil swallowed by the earthworm to form the worm
- The membrane surrounding the vacuole in a plant cell is called the
- plasmalemma B. tonoplast C. nuclear membrane D. endoplasmic reticulum.
- The smallest living organisms which share the characteristics of both living and non-living matter are A. bacteria B. fungi C. viruses D. protozoa.
- Green plants are distinguished from other living organisms by their abilityto
- make use of water B. make use of oxygen
- respond to sunlight D. manufacture their own food.
cast is ground up in the
- clitellium B. prostosium C. mouth D. gizzard.
- Which isthe correct order in an evolutionary sequence for the following plant groups?
- Bacteria ferns algae mosses seed plant.
- Bacteria ferns mosses algae seed plants C. Bacteria algae mosses ferns seed plants
- Bacteria mosses algae ferns seed plants.
- In Amoeba, osmoregulation is carried out by the A. pseudopodium B. food vacuole C. contractile vacuole D. nucleus.
Use the diagrambelowto answer questions 7 and8.
Head of a cockroach
- The part used for feeling islabelled
- 1 B.J C.K D.L.
- The mouth part of the insect is adapted for A. biting and chewing B. suckling and chewing
- biting and sucking D. piercing and sucking.
- Which of the following combinations differentiates a bonyfish from a cartilaginousfish? I Presence of gills. II Absence of gill slits III Possession of bonyskeleton IV Possession of laterally compressed body V
Possession of dorso ventrally compressed body
- I,II and II. B. I, III and IV. C.II,III and IV. D. II, III and V.
- Which is the most important adaptation of a bony fish to lifein water?
- The possession of a streamlined shape
- The presence of overlapping scales
- The covering of the body by thin film of shine. D. The possession of a caudalfin.
Use the diagram below to answer questions 11 and 12
- Which of the labeled part allows for efficient absorption of water andmineral?
- I. B.II C.III. D.IV.
- Starch is usually stored in the partlabelled A. I. B.II. C.III. D.IV.
- The failure of transport and respiratory systems in plants as well asthe presence ofreddish colour in stems and leaves result from the deficiency of
- magnesium B. nitrogen C. potassium D. phosphorus.
- The dental formula I3 C1 pm4 m2 is that of a 3 1 4 3
- goat B. rabbit C. man D. dog
- Thenitrifyingbacteria,Nitrosomonas,convertammoniato A. nitrites B. nitric acid C. nitrates D. nitrousoxide.
- The activity of ptyalin of ptyalin is likely to decrease with an increase in the concentration of
- oxygen B. starch C. protein D. acid.
- The phloem parenchyma is sometimes used for A. food storage B. supporting the stem C. production of the sieve tube D. transporting water.
- The process by which a red blood cell placed in distilled water absorbs until it bursts and releases its contents into the surrounding is known as
- osmosis B. plasmolysis C. turgidity D. haemolysis. Use the diagram belowto answer questions 19 and 20.
- The most appropriate title for the set up is A.quantitative measurement of respiration in plants
andanimals B.measurementofrespiratoryratesin
living organisms C. comparison between
photosynthesis and respiratory
- comparison of respiratoryrates in plants and animals.
- The part labeled Jis called
- porosimeter B. porometer C. manometer
- auxanometer.
- A circulatory system that does not allow mixing of oxygenated and de-oxygenated blood in mammalian heart is referred to as
- open B. haemocoelic C. single D.closed.
- Which of the following waste products in plant is excreted through the stomata and lenticels?
- Carbondioxide B. Alkaloids. C.Tannins
- Anthocyanins.
Use the diagram below to answer questions 23 and 24.
- The vertebra illustrated is
- lumbar B. thoracic C. caudal D.cervical.
- The neural arch islabelled
- I. B.II C.III D.IV.
- In animals, meiosiscomes
- after fertilization B. after every mitotic division C. before fertilization D. before every mitotic division.
- The fleshy base of a flower to which the different floral parts are attached is known as
- calyx B. sepals C. thalamus D. hypothalamus.
- When a short-sighted person views a distant object without spectacles, the image isformed
A.ontheretina B.in frontoftheretina C. behindtheretina D. on the blind spot.
The graph shows the relationship between the body and atmospheric temperatures for dog and lizard. What is the most appropriate deduction that could be made form the graph?
- Lizards are more likely to survive hazardsthan dogs. B. Both animals maintain a constant body temperature C. The dog’s body temperature is independent of the external temperature. D. The lizard’s body
temperature varies with that of thedog.
- The part of the brain that controls heart beat and breathing is the
- olfactory lobe B. cerebellum
- cerebral hemisphere D. medulla oblongata.
Use the list of ecological constituents below to answer questions 30 and 31
- Mango 2. Speargrass 3. Goat 4. Sheep 5. Temperature 6. Beans 7. Rock 8. Water.
- . Items 1-4 can be regardedas
- a population B. a community C. an ecosystem D. a niche.
- The physical factors are represented by A.1,5,6, B. 4,5,7, C. 5,7,8, D. 6,7,8.
- Which ofthe following setsis made up of decomposers? A. Rhizopus, earthworm and protozoa
- Mushroom, rhizopus and bacteria
- Bacteria, earthworm andnematodes
- Earthworm, sedges andplatyhelminthes.
- The correct order in a food chain involving the organisms(1) Grasses, (2) Hawks,(3) Snakes, (4) Grasshopper, (5) Lizardsis
- 1 2 3 4 5 B. 5 4 3 2 1 C. 1 4 5 3 2 D. 3 2 4 5 1.
- The organisms with the least number of individuals in a pyramid of numbers are the
- secondary consumers B. tertiary consumers
- primary producers D. primary consumers.
Use the list of blomes below toanswer questions 35 and 36.
- Desert 2. Rain forest 3. Southern Guinea savannah 4. Northern Guinea savannah.
35.. A biome with a low annual rainfall, few scattered trees within dense layer of grasses and found in Kano and Katsina States is
- 1 B.2 C. 3. D.4
- A biom where small mammals undergo aestivation for long periods is
- 1 B.2 C. 3. D.4
- Ecologicalsucession endswith the formation of a stable A. nich B. population C. pioneer community
- climax community
- In a drought situation, plants suffer from water stress which could resultin
- reduced biochemical activities B. enhanced chemical activities C. enhanced microbial activities D. reduced phototropic activities.
- The water-retention capacity of a soil indicates its A. fertility B. capillarity C. aeration level D. pH level.
- People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
- iron B. lead C. calcium D. magnesium.
- The differences and similarities among living things account for
- diversity B. stabilityC. competition D. evolution.
- People with sickle-cell anaemia have haemoglobin A. S and are homozygous recessive
- A and are heterozygous recessive
- S and are heterozygous recessive
- A and are homozygousrecessive.
- In the gene locus for eye colour in humans, the allele for brown eyesis dominant over the allele for blue eyes. If a homozygous brown-eyed girl has a brother with blue eyes , what are the likely phenotypes oftheir
parents’ eye colour? (Eye colour is not a sex-linked trait).
- Both parents have blue eyes. B. Their father has blue eyes and their mother has brown eyes.
- Both parents have brown eyes. D. Their mother has blue eyes and their father has brown eyes.
- If a woman’s genotype is Tt Qq Rr, what would be the gene content of her eggs?
- TQrtqr B. TQR, tqr C. TqR, tQr D. tQr, TQR.
- The sex-linked defect in which very slight cut produces severe bleeding is known as
- anaemia B. anorexia C. haemophilia D.haemolysis .
- A man who has the trait for colour blindness marries a normal woman. What percentage of their childrenwould be sufferers, carriers andnormal respectively?
- 25% and 50% B. 25%, 50% and 25%
- 50%, 25% and 25% D. 25%, 37.5% and 37.5%.
- Breathing root is an adaptation for survival in the A.mangroveswamp B.desertC.arborealhabitatD.savanna.
- Red coloration on the head of a male lizard helps itto A. mark its territory B. camouflage in the environment C. secure its mate D. defend itself.
- A phenomenon bywhich an animal goesinto a state of dormancy during the dry season iscalled
- hibernation B. aestivation C. incubation
- deactivation.
- The anatomical evidence usually used in support of all evolutionary relationship among whales, humans, birds and dogs is the possession of
- thick skin B. pentadactyl limb C.tail
- epidermal structures.
Biology 1995
- Which of the following does a virus have in common with animal cells?
- Nucleus B. DNA C. Glycogen D.Cytoplasm.
- Which ofthe followingorganelles are likelytobepresent in cellsthat are activelyrespiring and photosynthesizing? A. Nucleolus and centrioles B. Mitochondria and chloroplast. C. Lysosomes and ribosomes
- Golgi apparatus and endoplasmic reticulum.
- One common characteristic offungi, algae, mosses and ferns is that they
A.show alternation of generations B. reproduce sexually by conjugation C. produce spores that are dispersed D. possess chlorophyll II in theirtissues.
Use the diagram below to answer question 4 and 5
- Protein-like bodies are borne on the part labelled A. II B.III C.IV D.V.
- The sexual reproductive functions isperformed by the part labelled
- I B.II C.IV D.V
- Which ofthefollowingistransmittedthroughmosquitobite? A. Filariasis. B. Typhus. C. Plague. D. Schistosomiasis.
- Which of the following insects lays its eggs in horny, purse-like cases?
- Mosquito. B. Butterfly. C. Termite. D. Cockroach.
- In which of the following vertebrates does the skin function as a respiratory surface?
- Rat. B. Lizard. C. Fish D. Frog.
- Birdsmaintain theirbodytemperature withthehelp oftheir A. blood which maintains constant temperature B. feathers which cover the body C. skin which
conserves moisture D. veins which transport fluid of constant temperature to all body tissues.
- Secondary thickening in dicotyledonous stem is controlled by the A. xylem B. phloem C. cambium D. pericycle.
- 2H20 -2H2+ O2(g). The equation above represents a part of the light stage of photosynthesis. Which of the following must be present for this reaction to occur? A. Enzyme and light energy. B. carbondioxide and light energy. C. Light energy and chlorophyll II.
- Chlorophyll and enzyme.
- In an experiment to investigate the effect of nitrogen on the growth of plants, the substrate should be a medium of
- washedand sandB.sawdustC. cowdung D. claysoil.
- Which vitamin plays an important role in blood clotting? A.Vitamin A B.Vitamin K C. Vitamin B12. D.Vitamin C.
- The mammalian organ which acts both as a digestive and as an endocrine organ is the
- oesophagus B. liver C. pancreas D. spleen.
- Which ofthe following is NOT involved in the transport of substances in the body?
- Lymph B. Plasma C. Leucocytes D.Erythrocytes.
- The end product of glycolysis in plants and animals is A. pyruvic acid B. citric acid C. asparticacid
- malic acid.
- Duringrespiration, air circulatesroundplanttissuesviathe A. lenticels B. stomata C. guard cells D. intercellular spaces.
- The excretory structure in the earthworm isthe A. malpighian tubuleB. flame cell C. nephridium D. kidney.
- During the bending of the arm, the biceps muscle A. contracts and the triceps muscle relaxes
- relaxes and the triceps muscle contracts
C.and the triceps muscle contract D. and the triceps muscle relax.
- When a healthy shoot of a flowering plant isilluminated from one side, auxins accumulate on the
- non-illuminated side of theshoot
- illuminated side of the shoot C. upper side of the shoot D. lower side of the shoot.
Use the diagram below to answer questions 21 and 22.
- The type of placentation shown is
- axial B. marginal C. parietal D. central
- An example of a plant having the placentation shown is A allamander B. hibiscus C. water lily
- pride of Barbados.
- The term caryopsisis used to describea fruit in which the A. testa and pericarp are separate B. seed and
endocarp are fused C. testa and pericarp are fused D. seed coat and fruit wall are impermeable.
- The sex of a foetus is determinedduring A.meiosis B. copulation C. fertilization D. placentation.
- Biological growth refers strictly to an increase inthe A. protoplasmof an organism B. number of organisms C. size of an organism D. development of form.
- The process of walking is under the control of the part of the braincalled
- optic lobe B.olfactory lobe C. cerebellum D. medulla oblongata.
- The gland directly affecting metabolic rate, growth and development is known as
- adrenal gland B. thyroid gland
- mammarygland D. parathyroid gland.
Use the diagram below to answer questions 28 and 29
- The diagram represents
- sensory neurone B. relay neurone
- afferent neurone D. motor neurone.
- The part labelled X isthe
- axon B. cell body C. terminal dendrites D. synapse.
- Which of the following ions is involved in the conduction of the nerve impulse?
- C a2+ B. K+ C. H+ D. Mg2+.
- The depth of illumination in a water body can be measured with a
- photometer B. secchi disc C. hydrometer
- anemometer.
- In a food chain involving a primary producer, a primary consumer as well as a secondary consumer, the sharing of trophic energy is in the form thatthe
- primary consumer has more energy than the primary producer B. secondary consumer takes up all the energy contents of theprimary consumer
- energy is shared equally between the three groups of organism. D. secondary consumer gets only a small portion of the energy contained in the primary producer.
- In spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because
- it is produced by green plants during
photosynthesis. B. it is produced during respiration by animals C. it isabsorbed in ocean water
- green plants release it during the day.
- In a tropical rain forest, non-epiphytic ferns and fern allies occur as
- middle storey species B. upper storey species C. shade-loving species D. emergentspecies.
- Colonization of a bare rock surface istermed A. evolution B. speciation C. primary succession D. secondary succession.
- Which of the following is a measure for the controlof bilharzias?
- Cutting low bushes around homes
- Application of molluscicides in waterbodies
- Screening windows and doors with mosquito nets. D. Application of herbicides in water bodies.
- Some of the diseases caused by bacteria are A. tuberculosis, gonorrhoea and syphills
B.tuberculosis, gonorrhoea and AIDS
- Poliomyelitis, syphilis and gonorrhoea
- AIDS, cholera and tuberculosis.
- Environmental pollutants which can work through the media of water,soil and air include
- carbon monoxide B. noise
- sulphur (IV) oxide D.smoke.
- Human height is an example of a feature which depends on both
- genotype and phenotype B. genetic and
environmental factors C. mother’s genotype and environmental factors. D. phenotipic and environmental factors.
- A person with type O blood can donate to a patient with type A because the donor’s blood
- lacks antigens B. lacks anti-A antibodies
- lacks anti-B antibodies D. has both anti-A and anti-B antibodi\s.
- The DNA molecules is a chain of repeating A. nucleosides B. nitrogenous bases
- sugar Sphosphates D. nucleotides.
- The specific number of chromosomes in each somatic cell is represented by
- 2N B.23 C.2N DN.
- Aman with blood group A is married to a woman with blood group A. Which of the following group
combinationsis possible ifthe family has three children? A. B, A, AB. B. O.A,B. C. B, AB,AB.
- A,O,A.
- The F, of a cross between a tall and a dwarf plant was tall The F was advanced to F2. Howmany of 120F2plant will be dwarf?
- 30 B. 60 C. 90 D. 120.
45 The sons of a colour-bind woman will be colour blind regardless of the state of the father because
- the egg determines the phenotype of the son
- sons inherit the sex chromosomes of their mothers C. the father’s sex chromosome is weaker in sons D. sex-linked traits express dominance in females.
46 The slender, long and slightly curved beak of the sun bird is an adaptation for feeding on
- nectar B. small seeds C. big seeds D.insects.
- Scales on reptiles are a feature for
- conserving water B. conserving food C. protecting the skin D. locomotion.
48 The colour of the ventral surface of a fish is lighter than that ofthe dorsal. This is mainly
- an adaptation for moment B. an adaptation for camouflage C. for attracting mates
- for regulating body temperature.
- The least evidence in support of the theory of evolution is provided by the study of
- anatomy B. ecology C. geologyD. embryology.8
- From which group of animals are the mammals generally believed to have most recently evolved?
- Reptiles. B. Fishes. C. Amphibians. D. Birds.
Biology 1997
Use the diagram below to answer questions 1 and 2. 1. The structure labelled I isthe A. Golgi body B. mitochondrion
- endoplasmic reticulum D. vacuole.
- Protein is synthesized in the partlabelled
- I B.IIC.III D.IV.
- Which of the following is the youngest plants tissue?
- Meristem. B. Phloem C. Epidermis. D. Xylem.
- Virus differ from all forms oflife because they A have a thick cell wall B. feed on waste products of other organisms C. cause infectious
diseases D. require other living cells to multiply.
- The endoblast cells found in Hydra are used for A. reproduction B. offence and defence
- locomotion and nutrition D. food collection.
- Annelids differ from nematodes in thatthey A. exhibit bilateral symmetry B. aretriploblastic C. are metamerically segmented D. possess complete digestive system.
- Which of the following perform similar functions? A. Ascospores and ascocarp. B. antherozoids and rhizoid. C. Sorus and indusium. D. Strobili and inflorescence.
- A food substance wastreated with a fewdrops ofSudan III solution and a red coloration was obtained. The food contained
- protein B. starch C. fat D. mineral salt.
- Oozing out ofwater from the leaves of plantsin a humid environment is known as
- transpiration B. osmosis C. pinocytosis D.guttation
- The element that is essential for the coagulation of blood is
- potassium B. calcium C. phosphorus D. iron.
- Anaerobic respiration differs aerobic respiration by the production of
- less amount of energy and water B. greater amount of energy and alcohol C. less amount of energy and alchohol. D. Greater amount of energy water.
In ferns, the saprophyte
- develops from a haploid zygote B. reproduces sexually to produce spores C. is haploid and dependent on the gametophyte D. is diploid and independent of the gametophy.
The group of insects that undergoes complete
20 Stomata pores open when there is
- an increase in the sugar content of guard cells B. a decrease in the osmotic concentration of guard cells C. a decrease in the sugar content of
mesophyll cells d. an increase in the sugar content of mesophyll cells.
metamorphosis is
- houseflies, beetles and cockroaches B. cockroaches, grasshoppers and bees C. houseflies, beetles and
butterflies D. aphids, grasshoppers and butterflies
.
The process of deamination is essential for the A. digestion of protein B. secretion of bile C. formationof urea D. formation of antibody.
A band of connective tissue linking two bones in a
- The nitrogenous substance that is excreted by birds in order to conserve water is
- ammonia B. urea C. uric acid D. nitric acid.
joint is known as
- tendon B. cartilage C. synovial membrane D. ligament.
In mammals, the exchange of nutrients and metabolic products occurs in the
- lymph B. lungs C. heart D. liver.
The part of the stomach nearer the gullet is called the
- epiglottis B. cardiac sphincter C. duodenum
- pyloric sphincter.
- Theappendicularskeleton iscomposedofthe pectoralgirdle A. pelvic girdle, fore andhind limbs B pelvicgirdle and fore limbs C. lumbar vertebrae and pelvic girdle D. lumbar vertebrae, fore and hind limbs.
- The companion cells are part of the
- pericycle B. phloem C. pith D.xylem
- Trace elements are required by plants mainly for the A. formation of pigments and enzymes
B . production of energy and hormones
- manufacture of carbohydrates
- manufacture of proteins.
Use the diagram below to answer questions 14 and 15.
- The part that is similar to bone islabelled A.IV B.III C.II D.I.
- The parts labelled I and II constitute the A. crown B. neck C. root D. gum
- In which of the following groups of vertebrates would the largest amount of yolk be found in the egg?
- Mammals B. Fishes. C. Amphibians. D.Reptiles.
Use the diagram belowto answer questions 26 and 27.
- The function of the part labeled V is for the passage of A. pollen tube and pollen nucleus B. air, water and pollen nucleus C. air, antipodal cells and ovum
- synergids and egg cell.
- The female gamete is representedby
- I B.II C.III D.IV.
The type of vegetable reproduction illustrated in the diagram above is
- grafting B. adventitious bud C. sucker
- aerial layering.
- Coconut and oil palm fruits can be grouped as A. berry B. legume C. Capsule D.drupe.
- The substance that isresponsible for apical dominance in plants is known as
- gibberellin B. tannin C. auxin D. kinin.
- The part of the brain that regulates most biological cycles in humans is
- olfactory lobe B. optic lobe C. medulla oblongata D. pineal body.
- The ability of the eye to focus on both near and distant objects is termed
- image formation B. refraction C. hypermetropia D. accommodation.
- Thespeed ofwindcanbemeasuredwithan instrumentcalled A. hydrometer B. secchi disc C. anemometer
- wind vane.
Which organism in the food-web illustrated above is an omnivore?
- Weevils. B. Rat. C. Hawk. D. Prayingmantis.
- Toads and lizards in an ecosystem depend on a limited quantity of food. This is an example of
- parasitism B. intraspecific competition C. predation D. interspecific competition.
- Adaptive features of plantsto desert conditionsinclude A. thick barks, succulent stems and sunken stomata B. thin barks, succulent stems and sunken stomata C. thin barks, air floats on stems and sunken stomata D. airspacesin tissues, adventitiousrootsand thick barks.
- The Southern Guinea Savanna differsfrom the Northern Guinea Savanna in that ithas
- lower rainfall and shorter grasses B. less grasses and scattered trees C. more rainfall and taller
grasses D. less arboreal and burrowinganimals.
- After a heavy rainfall and the formation of a large pond, the most likely sequence of changes in the vegetation of the pond is
- Euglena- water lily –Spirogyra-grass B. waterlily – Spirogyra grass – Euglena C. Spirogyra –
Euglena – grass – water lily D. Euglena –
Spirogyra – water lily– grass.
- In a soil sample, the relative amounts of the different soil particles can best be determined by the process of A. filtration B. centrifugation C.precipitation
- sedimentation.
- Which is the most important pollutant of the marine environment in Nigeria?
- Insecticides B. Sewage C. Oil D. Inorganic fertilizers.
- One of the most effective ways of controlling guinea worm is by
A.treating the disease B. public enlighten men
campaigns. C. accelerating rural development D. provision of portable drinking water.
- During binary fission in lower organisms, thenucleus is known to undergo
- mitosis B. meiosis C. fragmentation D. mutation.
- One reason for the success of Mendel’s work is thathe A. was the first to carry out research work on modern genetics B. introduced quantitative and qualitative elements into his work C. selected two characteristics only at a time for study D. drew up his laws of
inheritance based on his knowledge of chromosomes.
- The homozygo condition Hbs Hbsresults in sickle cell anaemia whereas HbA Hbs has the sickling trait. What is the probability that a couple with the sickling trait will give birth to one normal child?
- ½ B. ¼ C. 1/8 D. 0.
- Which of the following characters is NOT sex-linked? A. Albinism B. Baldness. C. Haemophilia
- Colour blindness.
- Water loss is regulated in plants and animals by both the A. scales and the skin B. scales and the hair
- thick leaves and the feathers D. leathery curticle and the feathers.
- What combination of charactersshould a prey develop to survive in the environment of its predator?
- Camouflage, well developled limbs andeffective vision. B. Showy colour, big body and well
developed limbs. C. Camouflage, big body and effective vision. D. Show colour, well developed muscles and an acute sense ofsmell.
- The three classes in a termitariumare
- soldiers, queen and workers B. workers,soldiers and reproductives C. soldiers, workers and
kings D. kings, queen and soldiers.
explanation for the theory of evolution because A. the deposits have remains of organisms characteristic of when they were formed B. different strata have remains of organisms of the same kind of only organisms with strong parts are fossilized D. most animal and plant fossils bear little resemblance to present day living specimens.
- use and disuse B. origin of species C. origin of life D. natural selection.
Biology 1998
- The nucleus is considered the control organelle of a cell because it
- containsthe geneticmaterial B. containsthe nuclear sap C. is bounded by the nuclearmembrane
- is located at the centre of the cell.
- The procaryotic cell type is characterized bya A.complex cytoplasm in which different regions are poorly defined . B. localization of differ regions of the cell into tissues. C. collection of organelles and macromolecular complexes D. simple cytoplasm with well-defined regions.
- The natural tendency of organism as they evolve is to A. decrease in size B. increase in number C. develop specialized structures D. feed indiscriminately.
- In snails, the hard calcareousshells are secreted by the A. radula B. ctendium C. pneumostome D. mantle
Use the diagram below to answer questions 5 and 6.
- The structure labelled I is formed as a result of the fusion of
- two pairs of nuclei B. several pairs of nucleis C. a pair of nuclei D. two pairs ofnucleoli.
- The special name of the part labelled II is A. gemetangium B. hypha C.suspensor
- zygospore
- The ability of the cockroach to live in cracks and crevices is enhanced by the possession of
- wings and segmented body B. compound eyes C. claws on the legs D. dorso-ventrally flattened body.
- The case of termites that lacks pigmentation isthe A. king B. worker C. solder D. queen.
- The structures that prevent food particles from escaping through the fish gills are calledgill
- arches B. filamentsC. rakers D. lamellae.
- A distinguishing feature ofmammalsisthe possession of A. skin B. scale C.nail D.hair.
- Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowing plant?
- EpidermisB. PericycleC. Xylem D. Cambium.
- The manufacture of carbohydrates by plants takes place only in
- the leaves B. the green stems C. chlorophylous parts D. flowering plants.
- In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency of
- copper B. iron C. magnesium D. calcium.
- In million’s test, when the reagent is added to a protein food item, a white precipitate is produced which turns A blue on heating B. yellow on heating
- green on heating D. red on heating.
- Regulation of blood sugar level takes place in the A. pancreas B. ileum C. liver. D. kidney.
- Unicellular organisms transport essential nutrients directly to all parts of their bodies by the process of diffusion because, they have
- a large volume to surfacearea ratio B. a large s urface area to volume ratio C. their bodies immersed in the nutrients D. their outer membrane made of cellulose.
- The heat of the adult frog consists of
- two auricles and two ventricles B. one auricle and one ventiricle B. one auricle and oneventricle
- two ventricles and one auricles D. one ventricle and two auricles.
- Inadultmammalianblood,thecellswhichlacknucleusarethe A The diaphragm and intercostals musclesrelax B. The thoracic cavityincreases in volume
- The diaphragm and intercostals muscles contract D.The diaphragm contracts and the intercostals muscles to relax.
- Which of the following movement occurduring exhalation?
A.thediaphragm contractsand theintercostalsmusclesrelax. 20. In which ofthe following groups of animals is the Malpighian tubule found?
A.Lizards, snakes and frogs B. Crickets, houseflies and grasshoppers C. Millipedes, centipedes and scorpions D. Earthworms, roundworms and
flatworms.
- Which of the following is not a function of the mammalian skeleton?
- Protection B. Respiration C. Transportation
- Support.
Use the diagram below to answer question 23 and 22.
- The ovary represented is
- half-superior B. inferior C. superior D.half-inferior.
- The corolla is partly represented by
- I B.II C.III D. IV.
- The most reliable estimate of growth is by measuring changes in
- length B. volume C. surface area D. dry weight.
- A dry fruit formed from two or more carpels containing several seeds is a
- follicle B. legume C. capsule D. schizocarp.
- Theoutermostembryonicmembranein themammalisthe A. amnion B. chorion C. allantois. D. yolk sac.
- The small masses of nervous tissues in which many neurons have their nuclei are called
- dorsal roots B. ventral roots C. ganglia
- synapses.
- A group of organisms of different species living ina particular area is described as a
- colony B. community C. population D. niche.
- Which of the following is the direct consequence of transferring energy from one trophic level to another?
- An increase in biomass B. A decrease in the efficiency of energy conversion C. An increase in the numbers of resulting individuals
- A decrease in the resulting biomass.
- The condition that encourages denitrification is A. low soil oxygen B. high soil nitrogen C. absenceof soil bacteria D. lightning and thunderstorm.
- A freshwater plant such as water lily can solve the problem of buoyancy by the possession of
- aerenchymarous tissues B. dissected leaves C.. thin cell walls of the epidermis
- water-repelling epidermis.
- The sequence of the biomes in Nigeria from Port Harcourt toDamaturu is
- estuarine ’! rain forest ’! Guinea savannah ’! Sahel savannah B. rain forest ’! Guinea savannah ’!
estuarine ’! desert C. estuarine ’! Guinea savannah ’! rain forest ’! Sahel savannah D. rain forest ’! estuarine ’! Guinea savannah ’! desert.
- Soil micro-organisms are beneficial because oftheir involvement in
- photosynthesis B. translocation C. cycling of nutrients D. respiration using soil air.
- Which of the following groups of diseases are associated with water? I Onchocerciasis II
SchistosomiasisIII. DracunculiasisIV.ElephantiasisV. Taeniasis.
- I,II and III B. II, IVand V C. II, III and IV D. I, II and V.
- One of the waysin which bodycells differ from gamete cells is inthe
- type of centromeres they contain B. number of chromosome pairs they contain C. type of
chromatids they contain D. number of
chromosomes they contain.
- In blood transfusion, agglutination occurs when A. white blood cellsfrom two individuals meet
- two different antibodies meet C. two different antigens meet D. contrasting antigens and
antibodies meet.
Use the diagram below to answer question 37 and 38.
The alternate depletion patterns of mineral resources over time. 37. The unrestricted pattern is presented by A. I B.II C.III D.IV.
- The line thatrepresents efficient recycling combined with stringent conservation is
A.IV B.III C.II D.I.
- After one week of life, the weights offive chicks of the same sex hatched simultaneously from the eggs the same hen and fed on the same diet were 45g, 40g 35g, 33, and 30g. Thisis an example of
- growth rate B. natural selection C. variation D. mutation.
- The phenotype of an individual can be summed up as the
- totality of the expressed traits B. individual’s physical appearance C. individual’s entire genetical make-up D. physiological traits of the individual.
- The correct increasing order of size for the cell compoents responsible for heredity is
- chromosome DNA nucleus gene
- DNA Gene chromosome nucleus
- Chromosome nucleus DNA gene
- DNA gene nucleus chromosome.
- A sex-linked character cannot be passed on directly from
- father to son B. mother to daughter C. mother to son D. father to daughter.
- The biological association that contributes directly to succession in a community is
- competition B. predation C. parasitism
- commensalism.
- The group of insects that have mouth parts adapted for both piercing and sucking is
- cockroaches, aphids and mosquitoes B. aphids, houseflies and moths C. mosquitoes, tsetse flies and aphids D. aphids, beetles and grasshoppers.
Use the diagram below to answer questions 45 and 46.
- The bird’s bill adapted for fishing islabeled A I B.II C.III D.IV.
- Toes of the feet ending in a sharp, curved hook suitable for holding and tearing are most likely to belong to the bird with the bill in
- I B.II C.III D.IV.
- In the honey bee colony, the drones are
A sterile males with reduced mouth parts B. sterile ales with well-developed mouth parts C. fertile
males with reduced mouth parts D. fertile males
with well-developed mouth parts.
- In the whistling pine leaves are reduced to brown scale and young stems are green. This is an adaptation for A.obtaining food B. conserving nutrients C. storing water D. reducing transpiration.
- Thebest explanation for thetheories ofnaturalselection isthat
A all organisms have equal capacity for survival in their habitats B. organisms have varying capacities for survival in their habitats C. organisms compete or resources and better competitors survive and
thrive D. habitats allow only organisms that will
not have to complete for survival.
- The basic point of impact by changes which produce mutation isthe
- gametes B. chromosomes C. phenotype D. zygote.
Biology 1999
- The habitat of the cysticercus of Taenia solium is A. alimentary canal ofcattle B. muscles of pig C. alimentary canal of pig D. muscles of cattle
- The organism that has a hydrostatic skeleton is A. Tilapia B. Hydra C. Mosquito larva
- Earthworm
- These possession of scales, laying of eggs with shells and bony structure of the head are characteristics s hared by
- birds and reptiles B. fishes and birds
- reptiles and fishes D. birds and molluscs
- The group of Arthropods that has no antennae is the A. crustacca B. chilopoda C. arachnida
- diplopoda
- The structure that is most commonly identified in all living cells under the light microscope is the
- mitochondrion B. chloroplast
- nucleus D. ribosome
- Which of the following is an organ?
- guard cell B. liver C. xylem bundle D. blood
Use the diagram below to answer questions 7 and 8
- The structure labelled II is usedfor
- tasting B. feeling C. biting D. sucking
- The structure labelled III represents the A. mandible B. palp C. proboscis D. labium
- The division of a body into two equal halves along a l ongitudinal plane is called
- bilateral symmetry B. transverse section
- radial symmetry D. longitudinalsection
- In which of the following organisms does each cell combinethe function ofnutrition,reproduction andgrowth? A. Rhizopus B. Dryopteris C. Brachymenium
- Spirogyra
- The key event in the transition of the amphibians from water to land isthe
- replacement of the gills with lungs B. possession of webbed limbs C. development of long hind
- limbs. D. possession of tympanic
membrane
- In plant cells, the chloroplasts are located A. inside the cell wall B. outside theprotoplasm C. within the vacuole D. within the cytoplasm
- In woody stems, gaseous exchange take place through the A. micropyles B. stomata C. lenticels
- vessels
- Substances manufactured by the leaves are transported to other parts of the plant through the
- xylem B. companion cells C. sieve tubes D. cambium
- After a meal of yam has been digested the highest concentration of glucose is to be found in the
- hepatic artery B. pulmonary vein
- hepatic portal vein D. posterior vena cava
- The dark reaction of photosynthesis involves A. fixationofcarbon (IV)oxidetogive asix-carbon sugar B. fixation of carbon (IV) oxide with the help ofoxygen
C . useof carbon (IV)oxideto produceglucoseusingATP D. uhfixationofcarbon(IV)oxideon chlorophyllusinghydrogen
- Mammals acclimatize to reduced oxygen content at high altitudes by
- the stimulation of marrow to reduce the amount of erythrocytes produced B. increasing the rate at which erythrocytes are destroyed
- the stimulation of marrow to produce more
erythrocytes D. increasing the breakdown of the protein portion of the erythrocytes
- The modes of nutrition in Nitrobacteri Ascaris and Homo sapiens respectively are
- photosynthetic B. chemosynthetic, parasitic and holozoic C. photosynthetic, parasitic and
heterophytic D. chemosynthetic, holophytic
and holozoic
- The richest sources of vitamin A are
- palm oil and groundnut oil B. palm oil and carrots C. rice and groundnut oil D. oranges and carrots
- The force that holds water together in the form ofa stream within the xylem tube isthe
- cohesion of water molecules to one another by hydrogen bonds B. force of gravity attracting
the water molecules through the hydrogen bonds
- attractionbetweenthewaterandxylembyosmoticforce D. normal flowof water from the ground with the help of gravitational force.
- Yellowing of leaves is a symptom associated with deficiency of
- iron, calcium and magnesium B. nitrogen,sulphur and potassium C. sulphur, phosphorus and iron
- magnesium, nitrogen and iron
- The lymphatic system of mammals rejoins the blood circulatory system at the
- hepatic vein B. subclavian vein C. renal vein
- common iliac vein
- In dissection, the rib cage of a mammal hasto be opened in order to expose the
- diaphragm B. liver C. heated D. sternum
- Fertilization in humans usually takes place in the A. lower part of the uterus B. upper part of the uterus C. lower part of the oviduct D. upper part of the
oviduct
- Insects visit flowers in order to
- feed on the nectar B. deposit pollen on the stigma C. pollinate the flowers D. transfer pollen fromanthers
- In epigeal germination, the cotyledons are A. carried above the ground by the elongating hypocotyls B. pulled underground bythe elongating hypocotyls
- pulled underground bythe elongating epicotyl
- carriedabovethe ground bythe elongating epicotyl
- Bacteria multiply rapidly bymeans of
- budding B. fragmentation C. binary fission
- spore formation
- Thecorrectsequencefortheoperationofsmellinmammalsis A. chemicals⓪olfactorynerve endings⓪brain B. dissolved chemicals⓪nasalsensorycell⓪brain C. chemicals⓪mucusmembrane⓪sensorycells⓪brain D. dissolved chemicals⓪sensory cells⓪olfactory nerve ⓪ brain
Use the diagram below to answer questions 29 and 30
- The part labelled III isfor
- protection B. insulation C. lubrication
- growth
- The structure labelled II is known as
- sweat gland B. lymph vessel C. blood vessel D. nerve ending
- In mammals, the organ which performs digestive and endocrine functions is the
- liver B. pancreas C. gastric gland D. salivarygland
- The chitin in the exoskeleton of many arthropod is strengthened by
- calcium compounds B. organic salts
- lipids D. proteins
Use the diagram below to answer questions 33 and 34
- The structure labelled II articulates with III to form a A. sliding joint B. hinge joint C. pivotjoint
- ball-and-socket joint
- Which of the bones is the radius?
- I B. II C. III D. IV
- The construction of dams may lead to an increase in the prevalence of
- typhoid fever, measles and yellow fever
- tuberculosis, leprosy and typanosomiasis
- guinea worm, malaria andtuberculosis
- malaria, bilharziasis andonchocerciasis
- Floating microscopic heterotrophs are mostlygrouped as A. phytoplankton B. zooplankton C. microbes
- nekton
- Vaccination is carried out in order to
- check the production of poison
- increase the activityof white blood cells
- increase the number of red blood cell
- stimulate the production of antibodies
- Asoil consistingofalumina and iron (II)oxideis known as A. loamy soil B. clayey soil C. laterite D. podzol.
- The sign + is used to indicate an association where an organism gains, while 0 is used where an organism is unaffected. An association indicated as + 0 is knownas A. predation B. commensalism C. parasitism
- competition
Use the diagram below to answer questions 40 and 41 40. Primary consumers are found in
- 1,2,and 3 B. 1,3 and 7 C. 2,3 and 7 D. 2,4 and 5
- Thebiomassislikelytoincreasein thesequence A. 1⓪2⓪4⓪5 B. 1⓪3⓪4⓪5
- 3⓪5⓪6⓪7D. 5⓪4⓪3⓪1
- Which of the following characterized the white mangrove?
- prop roots B. buttress roots C. breathing roots
- stilt roots
- If the offspring of a cross between brown mouse (bb) and a black mouse (BB) are allowed to interbreed, how many different genotypes would result?
- 2 B. 3 C. 4 D. 5
- The biological factor that is unique to each individual is the
- DNA B. eye colour C. blood group E. RNA
- From an evolutionary standpoint, the older a fossil bearing rock is the more likely it is to contain
- aves as opposed to amphibians
- invertebrates as opposed vertebrates
- angiosperms as opposed to algae
- vertebrates as opposed to invertebrates.
- The very bright colours in some types of mushroom A. are a warning that they may be poisonous
- indicate that they are verytasty
- attract potential transporters of their spores
- performthe samefunction asbright coloursin flowers
- The least adaptive feature for arboreal life isthat A. possession of four limbs B. possession of claws C. development of a long tail D. counter shading of coat colour
- Which of the following is one of Lamarck’s theories? A.some variations are more favorable to existence in a given environment than others
- all living organismsareconstantlyinvolved in a struggle for existence C.the size of a given population remains fairly constant
- newspeciesoriginate through the inheritanceofacquired traits.
- The loud cry made by a brooding hen when a predator is around is meant to
- alert the poultry attendants
- attract cocks to come and fight the predator C. advertise the boundaries of its territory to intruders D. warn its chicksand other chickensofimpendingdanger
- The most important environmental factorwhich epiphytes in the rain forest compete for is
- water B. nutrient C. light D. space
Biology 2000
Use the diagram below to answer questions 1 and 2 1. Thepartthatwilldevelopintoan organforfeeling islabelled A. IV B. III C. II D. I
- The part labelled II is the
- silk thread B. thorax C. fore wing D. anchor
- Which of the following features are all associated with monocots?
- Fibrousrootsystem, branched network of veins and one seed leaf B. Fibrous root system, two seed leaves and f loral partsin threes C. One seed leaf, petalsin threes or groupsofthreesand parallel venation ofleaves
- One seedleaf, net-veined leaves and petalsin three or multiples ofthree
- The set of fins that controls steering, balancing and change of direction and pitch in fish is
- dorsal and anal B. pectoral and pelvic
- caudal and dorsal D. anal and pelvic
- The most recently evolved structure in animals is the A. hair B. cilium C. scale D. feather
- Coelom is absent in the class of animals termed A. mollusca B. reptilia C. arthropoda D. coelenterata
- Acharacteristicofvertebratesthat isuniquetomammalsis A. the presence of pentadactyl limbs
- parental care C. the possession of scrotum
- pulmonary circulation
- The order in which organic evolution has progressed in plants is
- thallophyta, schizophyta, bryophyta, pteridophyta and spermatophyta B. schizophyta, thallophyta, bryophyta, pteridophyta and spermatophyta
- pteridophyata, spermatophyta, thallophyta,
schizophyta and bryophyta D. bryophyta,
pteridophyta, spermatophyta, thallophyta and
schizophyta.
- In which part of the human body does the secretion of the growth hormone occur?
- head region B. waist region C. neck region
- gonads
Use the diagram below to answer questions 10 and 11
- The parts labelled I and II make up the
- glomerulus B. convoluted tubules
- malpighian body D. bowman’s capsule
- In mammals, re-absorption ofsalt takes place in A. IV B. III C. II D. I
- The part of the brain that controls body posture in mammalsisthe
- thalamus B. cerebrum C. spinal cord D. cerebrum
- Peripheral arrangement of vascular tissues in dicots is a characteristic of the internal structureof the
- leaf B. petiole C. steam D. root
Use the diagram below to answer questions 14 and 15
- The substance labelled II originatesfrom A. III only B. IV only C. I and IV D. III and IV
- The gas occupying the space labelled I is A. carbon (IV) oxide B. nitrogen
- hydrogen D.oxygen
- The scapula and the ischium are part ofthe A. pectoral girdle B. pelvic girdle
- appendicular skeleton D. hind limb
- Bacteriain thelargeintestineofmanareimportantin the A. synthesis of vitamins K and B2
- digestion of vegetables. C. synthesis of vitamins A and D D. absorption of water.
- Short-sightedness can be corrected by lenses whichare A. convex B. biconvex C. plano-convex
- conoave
- The inner ear contains twomain organs, namely, the A. eardrum and eustachinan tube B. cochlea and semi-circular canals C. oval window and ossicles D. pinna and cochlea
- For growth to occur in organisms, the rate of A. food storages must be low
- catabolism must exceed that of anabolism
- anabolism must exceed that ofcatabolism
- food storage must be high
- The production of violet colouration, when dilute Na0H solution is added to a solution of food substance, followed by drops of 1 % CUSO4solution while making indicates the presence of
- protein B. carbohydrates C. fats
- reducing sugar
- The greatest amount of energy will be obtained by the oxidation of 100kgof
- meat B. butter C. sugar D. biscuits
- The chamber ofthe mammalian heart with the thickest wall isthe
- right ventricle B. left auricle C. right auricle D. leftventricle
Use the graph below to answer questions 25 and 26.
- Serum differs from blood plasma because it. A. contains blood cell and fibrinogen
- contains soluble food and mineral salts
- lacks the blood proteinfibrinogen
- lacks blood cells and albumin
- The part labelled II is the
- mesocarp B. pericarp C. endocarp
- epicarp
- The fruit represented is mainly dispersed by A. animals B. water C. wind D. birds
- In an experiment to estimate the volume of air in a soil sample using a measuring cylinder, it was found that: Initial volume of water = p cm3 Volume of soil before mixing with water = q cm 3 Final volume of water after adding soil=r cm3. From the data above, which of the
following deductions is correct?
- r=p+q B. r>p+q C. q=r-p D. r<p+q
- An ecological succession often leads to
- an increase in species diversity B. a decrease in
species diversity C. an unstable community
- the dispersal of species
- Atmospheric nitrogen is converted to soil nitrogen for plant use by
- nitrification and combustion B. putrefaction andlighting C. lighting and nitrification D. combustion and putrefaction
- I High birth rate and high immigration rate II Lowbirth rate and high immigration rate III Low mortality rate and lowemigration rate IV High mortality rate and high emigration rate.
Which combination of the above can cause rapid
overcrowding in climaxbiotic communities and human settlements?
- II and III B. I and III C. I and IV D. I and II
Use the graph below to answer questions 31 and 32. 31. Thesoil becomestoxicto plantswhen the
concentration of its essential elements is in therangelabelled A. IV B. III C. II D. I
- The range at which soil essential element concentration isrecorded for optimal plant growth is marked
- IV B. III C. II D. I
- Which of the following growth activities in plants is brought about by gibberellins?
- Rapid cell division B. Tropic response
- Cell elongation D. Main stem elongation
- Which of the following are adaptations of animals to aquatic habitats?
- Gillsstreamlined bodies and lateral line
- Lateral line, streamlined bodies and lungs
- Gills, scaly skin and lungs
- Gills, streamlined bodies andspiracles
- Which ofthe following is an adaptation offorestspecies? A. Few stomata B. Thick bark C. Buttress roots D. Reduced leaves
- In a food chain, each succeeding level in a forward direction, represent?
- an increase in the number of individuals
- a decrease in the number of individuals
- an increase in the biomass of individuals
- a gain in the total energy being transferred.
- The disaster that would have the least destructive impact on animal life and balance in nature is
- chemical pollution B. forestfires
- oil spillage D. grasshopper pests
- The legs and beak of an egret resemble those of the heron because they
- both feed on fishes B. are both birds
- occupy similar niche D. occupythe same trophiclevel
- The factors that determine the distribution of vegetable zones are
- temperature, light, rain andhumidity
- light, humidity, air and mist C. temperature, light, air and humidity D. humidity, snow, frost anddew
- A cross between an albino female and a genetically normal male will result in offspring that are
- all albino B. all phenotypicallynormal
- all genetically normally D. halfalbinoand halfnormal
- The pollutants that contribute to the depletion of the ozone layer in theatmosphere are
- radioactive materials B. oxides ofsulphur
- oxides of carbon D. chlorofluorocarbons
- The surest way to combine the best qualities of both parents and the offspring is by
- cross-breeding B. inbreeding C. selective breeding D. pure breeding
- Blood grouping in human beings is derived from combination of
- two different alleles B. four different alleles
- three different alleles D. two different genes.
- The older fossil-bearing rocks, in contras to the more recent ones, are more likely to contain
- animals rather than plant remains B. invertebrates rather than birds C. flowering plants rather than mosses D. reptiles rather thatfishes
- In a group of male Agama lizards, the one brightest head colour is the
- dominant B. youngest C. oldest D. largest
- Examples of water-borne and sex-linked disease are A. taeniasis an malaria B. cholera and gonorrhoea C. typhoid and syphilis D. dracunculiasisand haemophilia
- The mutation theory of organic evolution was propounded by
- Gregor Mendel B. Hugo Vries
- Jean Lamarck D. Charles Darwin
- A certain savanna grasshopper changes colour from green during the rainy season tobrown during the dry season bush fires. The reason for these colour changes is that the
- grasshopper is getting older
- environment temperature ischanging
- grasshopper is avoiding predation
- grasshopper is frequentlymoulting
- Complex social behaviou and organization arefound mostly in
- insects B. birds C. reptiles D. mammals
- Which of the following structural features are adapted for uses other than water conservation?
- Succulent stems B. Scales in aannals
- Spines in plants D. Feathers in birds
- An association between the root nodule of a
Biology 2001
- The jointed structure in insectsthat bears organs which
leguminous plants and rhizobium sp is known as A. commensalism B. mycorrhiza C. parasitism D. symbiosis
- Amphibians are normally found
- on dry land and in water B. inwater andonmoistland C. on moist land D. in water
- Viviparity occurs mainly in the
- mammals B. reptiles C. aves D. amphibians
are sensitive to touch, smell and vibration isthe A. maxilla B. labium C. antenna D. abdomen
- Which of the following groups is the most advanced? A. Pteridophytes B. Bryophytes
- Thallophytes D. Gymnosperms
- Most monocots are easily recognized by their A. short leaves with petioles B. long and sword-like leaves C. long and palm-like leaves
- short leaves with many veinlets
- Waterfleas, wood lice and barnacles belongto the group A. arachnida B. crustacea C. insecta D. chilopoda
- The mode of feeding in Amoeba and Hydra is A. heterotrophic B. holophytic C. autotrophic
- symbiotic
- Which of the following organisms does not exist as a single free livingcell?
- Paramecium B. Volvox C. Amoeba
- Chlamydomonas
Use the diagram below to answer questions 10 and 11
- The structureslabelled II and III respectively are A. female organs and rhizoid B. male organs and rhizoid C. sporophyte and sori D. annulus and stalk ofsporangium
- In ferns, the structure above is equivalent to the A. zygote of a moss B. gametophytegenerationofamoss C. sporophyte generation of a moss
- sporophyte of a moss
- Thecentreforlearningandmemoryinthehuman brain isthe A. medulla oblongata B. cerebellum
- cerebrum D. olfactory lobe
- Urea formation occurs in the
- heart B. liver C. lung D. kidney
Use the diagram below to answer questions 14 and 15
- The structure that holdsthe yolk in position is labelled A. II B. I C. IV D. III
- The part labelled IV isthe
- albumen B. germinal disc C. sturdy D. stunted
- The gas produced during tissue respiration can be identified by using
- calcium hydroxide B. copper sulphate
- calcium carbonate D. sodium hydroxide
- A seedling grown in the dark is likely to be A. etiolated B. dormant C. sturdy D. stunted
- The enzyme invertase will hydrolyze sucrose to give A. maltose and glucose B. glycerol and fatty acid C. glucose and fructose D. mannose and galactose
- When yeast respires anaerobically, it converts simple sugar to carbon (IV) oxide and
- oxygen B. acid C. alcohol D. water
- The transportation of oxygen and carbon (IV) oxide in mammalsis carried out by
- leucocytes B. thrombocytes C. phagocytes
- erythrocytes
- The veins of the leaf are formed by the
- vascular bundles B. cambiumcells
- palisade tissue D. spongy mesophyll
Use the diagram below to answer questions 22 and 23 22. The parts which function together to bring about hearing are labelled.
- IV, V and VI B. I, II, IV and VI C. I, II, III and IV D. I, II and IV
- The part labelled II is the
- fenestra ovalis B. middle ear canal
- internal auditory meatus D. ear ossicles
- When specimen X is mixed with few drops of iodine solution, the appearance of a blue-black colour confirms that X is
- Galactose B. Starch C. Sucrose D. Glucose
Use the diagram below to answer question 25 and 26 25. The structure above represents a
- caudal vertebra B. lumbarvertebra
- thoracic vertebra D. cervical vertebra
- Blood vessels usually pass through the structure labelled A. III B. II C. V D. IV
- Salts and water are absorbed in the roots and transported to the leaves by
- diffusion through the xylem tissues B. osmosis through the phloem tissues C. diffusion through the phloem tissues D. osmosis through the xylem tissues
- The number of plant species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomoeas SSP, (5), sida spp (7) and Imperata spp (23) What isthe percentageofoccurrenceofImperat, q spp?
- 35% B. 16% C. 46% D. 23%
- Carbon (IV) oxide content of the atmosphere isleast affected by
- cutting down and clearing of forest B. forest fires C. burning of fossil fuels D. plant and animal respiration
- The factor that least affects food shortages in sub Saharan Africais
- flooding B. pests C. mixed-cropping D. drought
- The epiphytic habitat can best be described as A. arboreal B. estuarine C. aquatic D. terrestrial
- The highest percentage of energy in an ecosystem occurs at the level of the
- secondary consumers B. decomposers
- producers D. primary consumers
- The greatest influence on a stable ecosystem in nature is exerted by
- man B. pollution C. animals D. rainfall
- A freshwater pond may contain
- tadpole, water boatman, leeches and crab
- water beetle, shrimps, water snail and waterbug C. water lily, fish, water scorpion and dragontlylarva D. pond skater, water lily, shark and mosquito larva
- The hygrometer is used formeasuring
- relative humidity B. specific gravity
- rainfall D. salinity
- The distribution of plants in a rain forest in governed mainly by
- vegetation B. soil types C. amount ofsunlight D. rainfall pattern
- Both recessive and dominant characters are found A. on different chromosomes in the cell
- at the same locus of a homologous chromosome C. mother’s sex cell D. mother’s X chromosome
- The probability of a baby being a boy or a girl depends on the condition of the
- father’s sex cell B. father’s somatic chromosome C. mother’s sex cell D. mother’s X chromosome
- Which of the following statements is true of blood groups and blood transfusion?
- Group O isthe universal recipient
- Group A can donate to group A only
- GroupABisthe universal recipient
- Which ofthe following islikelyto encourage inbreeding in plants
- Dioecious B. Protandrous C. Manoecious
- Hermaphrodite
- A tall plant crossed with a dwarf on produces offspring of which half are tall and half are dwarf
what are the genotypes of the parents?
- TT, TT B. Tt, Tt C. TT, tt D. Tt, Tt
- In man, the ability to roll the tongue is a variation classified as
- anatomical B. physiological C. structural
- morphological
- Darwin is considered the first scientist who correctly explained the theoryof
- special creation B. spontaneous generation
- use and disuse D. organic evolution
- The stem of a typical aquatic plant usually hasmany A. air cavities B. intercellular spaces
- water cavities D. water-conducting cells.
- The role of the male adult honey bee isto A. clean the hive B. ventilate the hive
- mate with the queen D. care for the young
- The ability of an organism to live successfully in an environment is known as
- resistance B. competition C. succession
- adaptation
- The most important adaptation of xerophytes is the ability of the protoplasmto
- resist being damaged by loss of water
- store sugar and minerals in thevacuoles
- absorb water and swell
- shrink from the cellwall
- A green snake in green grass is able to escape notice from predators because of its
- disruptive colouration B. countershiping
- warning colouration D. cryptic colouration
- For heterotrophic organisms, competition isleas caused by the inadequacy of
- mates B. space C. light D. nutrients
Biology 2002
- An Amoeba and an unlaid chicken eggs are A. animal tissues B. organelles C. single cell
- organisms
- In corns food is usually stored in the
- leaves B. stems C. roots D. buds
- The animals that move by means of flagella include A.Chlamydomonas and Euglena B. Planaria and Amoeba C. Amoeba and Hydra D. Paramecium a nd Planaria
- The structures found only in plant cells are A. cell membrane and cytoplasm B. chromatin and nucleolus C. cell wall and chloroplast
- cell membrane and lysosome
5.. A flower that has both stamens and pistil is said to be A. staminate B. pistillate C. perfect D. imperfect
- When oil is poured into the breeding site ofmosquitoes, it A. deprives the larvae of water B. kills the adults C. suffocates the pupae D. slows down egg
development.
Use the diagram below to answer questions 7 and 8
- The correct evolutionary sequence of the organisms represented is
- I⓪III⓪II⓪IV B. I⓪I⓪IV⓪IC. III⓪II⓪IV⓪IV
- IV⓪II⓪III⓪I
- Ovoviparity is the type of fertilization exhibited by the organism labelled
- I B. II C. III D. IV
Use the diagram below to answer questions 9 and 10 9. In the diagram, the hawk is A. an omnivore B. a primary consumer
- a tertiary consumer D. a scavenger
- Example of competitorsare
- lizard and mouse B. snake andlizard
- grasshopper and mouse D. rabbit and snake
- One of the adaptations to life on trees by a monkey is its possession of digits which are
- extensible B. big C. opposable D.long
- The community of plants in which the same species occur from year to year isthe
- annual species B. pioneer vegetation
- perennial species D. climax vegetation
- The most common means of transmitting Acquired Immune DeficiencySyndrome (AIDS) is
- from mother to child B. through bloodtransfusion C. through sexual intercourse D. through the sharing of needles
- Plantstend to preventovercrowding bymeansof efficient A. water uptake B. seed germination
- pollination D. seed dispersal
- The physical and climatic factors of a region primarily determine the
A.kinds of animals inhabiting the area B. types of plants found in the area C. nature of the soil in the region D. community of organisms in the region
- A step in the movement of energy through an ecosystem is a description that best fits the term A. food chain B. trophic level C. pyramid ofnumbers D. food web
- In a field experiment the frequency of waterleaf was observed to be 48 after 20 tosses of a 2m2 quadrant. What is the density of the plant in the field?
- 1.2per m2 B. 2.4per m2 C. 4.8perm2
- 9.6per m2
- The supporting tissue of xylem is most poorly developed in
- mangrove swamp plants B. grasslandplants
- submerged water plants D. desert plants
- The addition of lime to claysoil serve to A. aid water retention B. close up thetexture
- prevent water-logging D. improve capillary action
- The excessive use of agro-chemicals could lead to the pollution of
- the lithosphere B. the atmosphere
- fresh water D. space
- In a population study using the transect method, a student islikelyto record the highest number ofspeciesin A. a tropical rain forest B. a guinea savanna
- a sahel savanna D. an estuarine swamp
- In his theory of evolution, Darwin implied that A. the struggled for existence among living organisms is sporadic
- the most successful organisms are those that best adapt to their environment
- organs ofthe body which are not regularly, used by an organism will disappear
- ny traits acquired by an organism during itslifetime can e passed on to its offspring
- The carnassial teeth of a carnivorous animal consistsofthe A. last upper premolar and the first lower molar
- last upper molar and the last lower molar
- first upper premolar and the first lower molar
- first upper molar and the first lower molar
- A featureofthe caste systems of bees and termitesisthat A. the workers are sterile B. the kings are bigger than the queens C. only the worker perform duties
- nuptial fight is performed by all members
- The structure that is common in the embryos of mammals, amphibians, birds, fishes and reptiles and which is an evidence of their common ancestry isthe A. eye B. chorion C. allantois B. gillslits
- Animals are restive when the environment in which they live becomes
- hot and dry B. cold and wet C. warm and humid D. windy and snowy
- Birds which are large with long straight pointed beaks, long necks and long legs are likelyto be
- insect eaters B. fish catchers C nectar feeders D. fruit eaters
- Examples of organismsin which extracellular digestion occurs are
- Fungus, Loranthus and housefly
- Rhizopus, sponges and earthworm C. Roundworm, tapeworm and Hydra
- Rhizopus, housefly and Hydra
- Themammalian erythrocytesdifferfromerythrocytesare A. discoid and nucleated B. discoid and enucleated C. amoeboid and nucleated D. amoeboid and
enucleated
- The presence of endoskeleton is characteristic of A. invertebrata B. vertebrata C. insecta
- coelenterata
- The capture and digestion of insects by a pitcher plant is a special form of nutrition termed
- autotraphic B. heterotrophic C chemosynthetic D. saprophytic
Use the diagram below to answer questions 32 and 33 32. Which of the following statements is correct about the experiment?
- The flask must be of the conical type
- Caustic soda can be replaced with distilled water C. The enclosed leaf will lose its green colour
- The leaves outside the flask serve as control
- The experimentalset-up can beusedto demonstrate that A. light is necessary for photosynthesis
- oxygen is necessary for photosynthesis
- photosynthesis occurs in the leaves of plants
- carbon (IV) oxide is necessary for photosynthesis
- When a marine fish was taken from theocean and put in a tank of fresh water, it died after a short period because
- the tank wastoo small compared to the large ocean B. the body cells of the fish swelled and burst as a result of the hypotonic fresh water
- the body cells of the fish shrank as their sap was hypertonic to be fresh water
- there was no food in the tank, so the fish starved
- Which of the following pairs of organsis located in the anterior half ofthe mammalian body cavity?
- Kidneys and lungs B. Heart and ovary
- Lungs and hearts D. Kidneys and heart
- The mode of nutrition exhibited by a tapeworm is A. symbiotic B. saprophytic C parasitic D.holozoic
- The organ located within the duodental loop in the mammal isthe
- spleen B. pancreas C. liver D. gall bladder
- In which ofthe following groups offruitsisthe pericarp inseparable from the seed coat?
- Nut B. Follicle C. Cypsela D. Cryopsis
- A person that is obese must avoid meals containing A. carrots and oranges B. margarine and butter
- beef and beans D. rice and yam
- Tissue respiration is importantfor the
- absorption of oxygen into the alveoli
- release of carbon (IV) oxide into the lungs
- release of energy for body use
- exhalation of carbon (IV) oxide from lungs.
Use the diagram below to answer question 41 and 42
- the
The function of absorption is performed by
structure labelled
A.I B. II C. III D. IV
- The structure labelled I represents the
- phloem B. xylem C. cortex D. pericycle
Use the diagram below to answer questions 43 and 44
- The gland usually found in theposition labelled is the A. adrenal B. thyroid C. pancreatic D. pituitary
- A hormone secreted at IV servesto
- facilitate the development offacial hairs
- raise the level of calcium ions in the blood
- lower blood glucose level
- make the body react to emergencies
- To select and retain the desirable trait of large body size with farmer has observed in his herd, the farmer needs to
- feed the animals in the herd with more food
- cross-breed his animals with a different herd
- inbreed the animalsin his herd
- prevent diseases in his herd
- In a population ofliving things, the parameters ofsize, height, weight and colour are example of
- discontinuous variations B. continuous variations C. physiological variations D. non-heritable variations
- If XN isthe dominant allele for normal vision and Xnthe recessive allele for colour-blindness, a boy with the genotype YXnwill
- have normal vision B. be colour-blind
- be totally blind D. be a carrier of colour-blindness
- The first four children of a couple were all girls. The probability that the fifth will also be a girl is
- 1/5 B. ¼ C. 1/3 D. ½
- Genetic counselling isimportant when a marriage is planned between a
- Rh woman and Rh man B. Rh woman and Rhman C. Rh woman and Rh man D. Rh woman and Rh man
- What proportion of the offspring of a cross between two heterozygous parents will exhibit the recessive condition phenotypically?
- ¼ B. ½ C. ¾ D. 4/4
Biology 2003
- The umbrella-shaped fruiting body of a fully developed mushroom isthe
- mycelium B. basidium C. pileus D. stipe
Use the diagram above to answer question 2 and 3.
- The processes of water loss and intake indicated by the arrowslabelled I and II are respectively
- evaporation and osmosis B. exhalation and osmosis C. osmosis and diffusion D. urination and diffusion
- A noticeable adaptation of the animal to its aquatic habitat is the possession of
- webbed digits B. four limbs C. a widemouth D. large eyes
- The similarity among organisms belonging to the same group will be least within each
- order B. family C. species D. kingdom
- Hermaphroditic reproduction can be found among the A. annelids and molluscs B. pisces and amphibians C. coelenterates and platyhelminthes D. arthropods and nematodes
- One distinctive feature in the life history of liverworts isthat they exhibit
- vegetative reproduction B. alternation of generation C. sexual reproduction D. asexual reproduction
Use the diagram above to answer questions 7 and 8
- Food is stored in the structure labelled
- IIII B. IV C. I D. II
- The structuresthat are common to both plant and animal cell are labelled
- II and III B. III and IV C. IV and I D. I and II
- Thecell componentthatis presentin a prokaryoticcellisthe A. ribosome B. mitochondrion C. chloroplast
- nuclear envelope
- In the egg of a bird, the embryo is located in the A. yolk B. embryo disc C. chalaza D. albumen
- An insect whose economic importance is both harmful and benefit is the
- butterfly B. mosquito C. blackfly D. tsetsefly Use the diagram below to answer question 12 and 13.
- The experiment is used to demonstrate that A.transpiration occurs through the leaves B. plants lose water through guttation C. leaves are
important to photosynthesis D. water is necessary for photosynthesis
- In the experiment, the layer of oil serves to prevent water loss by
- Osmosis B. Transpiration C. Evaporation
- Guttation
- If water that has been coloured red is poured at the base of a wilting plant, it will appear as a red stain in the cells of the
- phloem B. parenchyma C. xylem D. epidermis
- The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by
inoculating the soilwith
- saprophytic bacteria B. rhizobium
- denitrifying bacteria D. nitrosomonas
- OrganismsI, II, III and IV have surface/volume ratios of1:2. 1:3, 1:4 and 1:5 respectively.The organism that is likely to have the most complex transport system is A. III B. IV C. II D. I
Use the diagram below to answer questions 17 and 18
- The aim of the experiment is to demonstrate A. the presence of carbon (IV) oxide in exhaled air B. thatinmammalsgaseousexchangetakeplacein thelungs C. the part played by the pleural cavity and diaphragm
in respiration D. that a large amount of oxygen is absorbed by the lungs.
- In the experimental set-up, therubber sheet represents the organ called
- diaphragm B. lungs C. intercostal D. pleural cavity
- The part of the mammalian digestive systemwhere absorption of nutrients takes place is the
- duodenum B. colon C. ileum D. oesophagus
20 The dark reaction of photosynthesis involves the A. release of oxygen and the splitting of water
- photolysis of water and the production of starch C. reduction of carbon (IV) oxide to organic compounds D. splitting of water into hydrogen ions
- The most important hormone that induces the ripening of fruit is
- Cytokinin B. Indole acetic acid C. Ethylene
- Gibberellin
- Metabolic production of urea is carried out in the A. urinary bladder and kidney B. pancreas
- kidney and malphigian tubule D. liver
- In mammalian males, the excretory and reproductive system share the
- ureter B. testes C. vas deferens D. urethra
- The best method of propagating sugarcane is by A. stem cuttings B. seed sowing C. layering
- grafting
- The response of plants to external stimuli in anon directional manner is knownas
- nastic movement B. photropism C. tactic
- geotropism
Use the diagram below to answerquestions 26 and 27
- The structure can be found in the
- peripheral and central nervous systems
- peripheral nervous system only
- sympathetic and parasymapathetic nervoussystems D. central nervous system only
- The point marked I is referred to as
- myelin sheath B. dendrites C. node of Ranvier D. axon
- Homologous pairs of chromosomes separate during A. meiosis B. cytolysis C. mitosis D. cleavage
- An example of a caryopsisis
- coconut B. tomato C. guava D. maize grain
- A limiting factor in a plant population near a chemical factory is likely to be
- humidity B. pH C. wind D. light
- The pioneer organisms in ecological succession are usually the
- lichens B. algae C. ferns D. mosses
- Mycorrhiza is an association between fungi and A. roots of higher plants B. ilamentousalgae
- bacteria D. protozoans
- A density-dependent factor that regulates the population size of organismsis
- sudden flood B. disease C. fire outbreak
- drought
- The most effective method of dealing with non biodegradable pollution is by
- burying B. dumping C. incineration
- recycling
- Soil fertility can best be conserved and renewed by the activities of
- microbes B. earthwormsv C. man D. rodents
- The correct sequence of biomes from northern to southern Nigeria is
- estuarine⓪tropicalrainforest⓪guineasavanna ⓪sahel savanna B. sahel savanna ⓪sudan savanna⓪guinea savanna ⓪tropical
rainforest
⓪estuarine
- sahel savanna ⓪tropical rain forest⓪estuarine⓪ guinea savanna D. guinea savanna ⓪sudan savanna ⓪tropical rainforest ⓪sahel savanna ⓪ estuarine
- One exampleof fossil fuels is
- coral B. limestone C. firewood D. coal
- If the pair of allelels for baldness is given as Bb,a female carrier will be denoted by
- XBXb B. XBXB C. XbY D. XBY
- An organism that has been extensively used to test the chromosome theory of heredity is
- Homo sapiens B. Drosophilamelanogaster
- Zea Mays D. Musea domestica
- Afeatureassociatedwith theY-chromosomein humansis A. facial hairs B. prominent fingernails
- long eyelashes D. enlarged breast
- A man and his wife are both heterozygousfor the sickle cell trait. The likely percentage of their offspring that will be either carriers or sicklersis
- 50% B. 25% C. 75% D. 100%
- The type of reproduction that leeds to variation in animal and plant populationsis
- budding B. vegetative C. asexual D. sexual
- If a DNA strand has a base sequence TCA, its complementary strand mustbe
A.ATG B. GAT C. AGT D. TAG
- Which of the following requires the use of carbon dating to prove that evolution has occurred?
- biochemical similarities B. molecular records
- fossil records D. comparative anatomy
- The presence of sunken stomata and the folding of leaves are adaptations to
- prevent entry of pathogens B. prevent guttation C. remove excess water D. reduce water loss
- Spines and shells on animals are adaptations for A.physical defence B. camouflage C. chemical
defence D. mimicry
- The inactive state exhibited by an animal duringhot dry seasons is termed
- aestivation B. dormancy C. resting D. hibernation
- An insect with a mandibulate mouth part will obtain its food by
- chewing B. chewing and sucking C. sucking
- biting and chewing
- An example of cryptic colouration is the A.bright marks on a poisonous tropical frog on
variegated leaves B. bright colour of an insect
pollinated flower C. mottled colours on mothsthat rest on lichens D. green colour of a plant
- An argument against Lamarck’s heory of evolution is that A .acquired traits cannot be passed onto the offspring B. disuse of body part cannot weaken the part
- disused part is dropped off in the offspring
- traits cannot be acquired through constant use of body parts.
Biology 2004
- Thegall bladderofamammalhas a ductconnectedtothe A. duodenum B. liver C. pancreas D. smallintestine
- The opening of the stoma is controlled by the A. presence of guard cells B. decrease in solute concentration in the guard cells C. increase in solute concentration in the guard cells
- presence of a pore.
Use the diagram below to answer questions 3 and 4 3. Yam is used in this set-up because it A. act as a semi-permeablemembraneB. act as a storage organ C. is permeable to the saltsolution
- is a plant material
- Which of the following results is to be expected If the set-up is left for several hours?
- Movement of water from the saltsolution
- Decrease in the size of the yam C. Movement ofthe salt solution into the water D. Decrease in the volume of water inside the yam.
- The eggs of birds contain relatively larger quantities of yolk than those of amphibians and reptiles because A. embryonic development is longer inbirds
B.birds lay shelled eggs C. birds are generally bigger in size D. those of birds are fertilized internally.
- In the internal structure of plants, a wide pith in the centre is common to
- dicot root and monocot stems B. dicot stems and monocot stems C. dicot stem and monocot roots D. dicot roots and monocot roots.
- If a nursing mother is not producing enough milk, her hormonal system is probably deficient in
- testosterone B. thyroxin C. insulin D. prolactin Use the diagram below to answer questions 8 and 9
- The type of joint between adjacent bones in the part labelled II isthe
- hinge joint B. suture joint C. slidingjoint
- ball-and-socket joint
- The boneslabelled II are called
A.thoracic vertebrae B. lumbar vertebrae C. cervical vertebrae D. sacralvertebrae.
- The breakdown of fats and oilsinto simpler absorbable compoundsis catalyzed by the group of enzymes called A. peptidases B. amylases C. lipases D. hydrolases
- The two key cations involved in the action potential of nervous transmissions are
- Mg2and K+ B. Na+and Fe2+ C. Fe2+ and Mg2+ D. Na+and K +
Use the diagram below to answer questions 12 and 13
- The part labelled II is the
- anther B. style C. filament D. stigma
- The process of pollination involves the transfer of pollensfrom
- III to IV B. IV to I C. II to III D. I to II
- The anaerobic fermentation of a glucose molecule yields
- pyruvic acid and alcohol B. 38 ATPmolecules C. water and carbon (IV) oxide D. 2ATP molecules and alcohol
Use the diagram below to answer questions 15 and 16 15. The function of the part labelled III is to A. produce oil for the skin B. carry blood and
nitrogenous waste C. contract to pull the hair erect
- conduct nervous impulses
- The sweat gland is the structure labelled
- IV B. III C. II D. I
- The type of reproduction that is common to both Hydra and yeast is
- grafting B. budding C. conjugation D. binaryfission
- Epigeal germination of a seed is characterized by A.lack of growth of the hypocotyls B. more rapid elongation of the hypocotyls than the epicotyl
- more rapid elongation of the epicotyl than the hypocotyl D. equal growth rate of both the
hypocotyl and epicotyl.
- All living cells require water because it
- is a medium that neutralizes acids in cells
- is the main source of energy for the cells
- prevents the development of diseases in cell
- is a medium for all metabolic reactions.
- The surface of an alveolusin a mammalsis wellsupplied with tiny blood vessels known as
- capillaries B. arteries C. arterioles D. venules
21 Nervous control differsfrom hormonal control in that the former
- is a slower process B. involves only chemical transmission C. has no specific pathway
- produces short-term changes
- Identical twinsinherit their genes from
- one egg and two sperms B. two eggs and a sperm C. the same egg and sperm D. different eggs and sperms
- Paternity disputes can most accurately be resolved through the use of
- DNA analysis B. fingerprinting C. tongue-rolling D. blood group typing
- Sex-linked genes are located on
A.X-and Y-chromosomes B. homologous
chromosomes C. X- chromosomes
- Y- chromosome.
- In a Mendelian cross of red and white varieties of the four o’clock plant, the F1 generation expresses
incomplete dominance by having flowers which are A. multicoloured B. pink C. red D. white
- Insects are considered the most successful among the invertebrates because they
- survive in various environmental conditions
- possess the ability tochange their forms C. possess exoskeletons D. have wing for flight
- The absence of special food and water-conducting systems restricts the body size in
A the bryophytes and the pteridophyes
- the thallophytes and the pteridophytes C. liverworts, mosses and ferns D. algae, liverworts and mosses.
- A peculiar characteristic of mammals isthat they A.have sebaceous glands B. have teeth C. are warm blooded D. have lungs.
- The rods in the retina of the eye are examples of A. organs B. cells C. systems D. tissues
- The larval stage of a mosquito is called
- caterpillar B. maggot C.wriggler D. grub
- The most common characteristic of the fungal hyphae is the possession of
- cell-like partitions formed by cross-walls
- cell-like compartments with one nucleus each
- a multicellular mycelium in the substrate
- cell walls that are both rigid and chitinous
Use the diagram below to answer question 32 and 33.
- The part labelled II is responsible for
A respiration B. protein synthesis C. excretion
- photosynthesis
- The endoplasmic reticulum is represented by the part labelled
- III B. VI C. I D. II
- The function of the long-winged reproductives in a termite colony isto
- protect theyoung B. participate in swarming
- feed the young D. disperse the population
- Aplant-likefeatureinEuglena is the
- large vacuole B. gullet C. pellicle D. pigment spot
- Which ofthe following is an example ofintraspecific competition?
- Yam and potato shoots growing out through the same window B. A lizard and an ant-eater chasing an i nsect C.Aworkertermiteanda soldierin a limitedspace D. A hawk and an eagle targeting the same chicken
- The spots and stripes of the leopard and tiger are examples of
- warning colouration B. countershading C. cryptic colouration D. disruptive colouration
- Rodents gnaw on food with their
- strong jaws B. flat-ridged teeth C. chisel-likefront teeth D. molar teeth.
- An evidence of the relationship between living organisms and their extinct relatives can best be
obtained from
- palaeontology B. embryologyC. comparative
anatomy D. comparative physiology.
- Plants survive hot dry conditions by
- producing numerous leaves B. having numerous stomata C. having evergreen leave D. storing
water in large parenchyma cells.
- A caterpillar and an aphid living in different parts of the same plant can be said to
- be in similar microhabitats B. occupy different ecological niches C. occupy the same ecological niche D. be in different habitats
- The progressive loss of energy at each level in a food chain leads to
- a decrease in biomass at each successive level B. an increase in the number of organisms at each successive level C. an increase in the total weight of living matter at each successive level D. an increase in biomass at each successive level
- The soil type that will be most difficult to plough in a wet season is one that is
- sandy B. loamy C. silty D. clayey
Use the table below to answer questions 44 and 45
- Which of the zones is likely to be a desert? A. III B. IV C. I D. II
- High relative humiditywill be expected in zones A. II and III B. II and IV C. I and IV D. I and III
- One adaptation ofreptilesto water lossisthe presence of A. long tails B. long sticky tongues C. keratinousscales D. claws on limbs.
- The scarcity of food causes a sudden decrease in population size by
- minimizing the rate of competition B. raisingthe mortality rate C. bringing about immigration
- decreasing the reproductive rate
- The association between termites and the cellulose digesting protozoan in their guts is an example of A. mutualism B. saprophytism C. commensalism D. parasitism
- A state in Nigeria that is most susceptible to desert encroachment is
- Kaduna B. Kastina C. Kwara D. Taraba
- A farm practice that resultsin the loss ofsoil fertility is A. continuous cropping B. mixed farming
- bush fallowing D shifting cultivation.