Jamb Biology Past Paper 1983 PDF

Uploaded on www.myschoolgist.com.ng Biology 1 9 83- 2 0 0 4 JAMB Questions  Uploaded on www.myschoolgist.com.ng Biology 1983 1. Root hairs are developed from the …...

Uploaded on www.myschoolgist.com.ng Biology 1 9 83- 2 0 0 4 JAMB Questions  Uploaded on www.myschoolgist.com.ng Biology 1983 1. Root hairs are developed from the … A. a protein B. a carbohydrate, C. a fat A. root apex B. epidermis of roots D. a fatty acid and glycerol E. an amino acid. C. vascular bundles D. endodermis E. pericycle 10. Which of the following elements are necessary for the formation of chlorophyll in a plant? Use Fig. 1 to answer questions 2-4 A. Magnesium and iron B. Calcium and potassium Fig 1 C. Calcium and sulphur D. Potassium and sulphur E. Phosphorus and potassium. 11. Which of the following statements is NOT true of mammalian erythrocytes? A. They have haemoglobin B. They appear yellow when looked at singly C. They are disc-shaped D. The cells are more numerous than leucocytes E. They have nuclei at maturity. 12. In woody plants, gases and water vapour are transported across the stems by the Fig 1 represents a cross-section of a part of a A. xylem fibres B. medullary fibres C. medullary rays dicot plant. D. phloem fibres E. phloem parenchyma. 2. Which of the following features can be used to identify Fig 1? 13. Which of the following substances is NOT found in A. Position of 7 B. Its circular nature C. Number of 5 urine? D. Presence of 3 E. Width of 2. A. Water B. Sodium chloride C. Nitrogenous compounds D. Calcium chloride E. Nitrogenous salts. 3. The main function of 6 is to A. separate 5 from 7 B. produce more of 5 and 7. 14. The kidneys of all vertebrates act as osmo C. produce cork D. translocate water and mineral salt regulators. This means that they E. conduct carbon dioxide to the other parts. A. keep the composition of the plasma constant B. regulate osmotic processes C. Control the volume of 4. The main function of 4 is to blood entering the kidneys D. decrease the osmotic A. surround the inner tissues B. produce cork pressure of blood E. increase the osmotic pressure of C. produce root hairs D. produce lateral roots blood. E. produce more of 3. 15. The movement of part of a plant in response to 5. In a dicot leaf, guard cells differ from other external stimulus of no particular direction is epidermal cells because they A. taxism B. tropism C haptotropic movement A. have no definite shape B. lack nuclei D nastic movement E. phototropism C. are smaller D. contain chloroplasts E. lack vacuole. 16. The part of the mammalian brain responsible for 6. Which of the following structures is NOT found in the maintaining balance is the female agama lizard? A. medulla oblongata B. olfactory lobe A. Pre-anal pads B. Eardrum C. Gular fold C. cerebellum, D. cerebrum E. frontal lobe. D. Nasal scale E. Nuchal crest. 17. 7. Herbs differ from shrubs because they A. do not produce fruits B. are useful to herbalists C. do not become woody D. are only annuals E. are only perennials. 8. If an isolated living cell is left in distilled water for two hours, it is likely to Fig vertical section of onion bulb. A. lose some of its water to the surrounding water B. lose all of its water to the surrounding water Which of the labelled parts in Fig 2 will develop into a C. reproduce by binary fission D. become more turgid. new bulb? A. 1 B. 4 C. 2 D. 3 E. 5. E. die due to excess water. 18. In the onion bulb, food is stored in the 9. If an organic compound has its Hydrogen: Oxygen A. stem B. lateral buds C. cotyledons ratio as 2:1, it is likely to be D. outer scale leaves E. leaf bases.  Uploaded on www.myschoolgist.com.ng 19. Groundnut is not really a ‘nut’ in the biological sense 32. Starting from the skull end, the vertebrae are because arranged in the following order: A. it is harvested from inside the ground B. its pericarp A. axis, atlas, cervical, thoracic and limbar is not hard and tough. C. the fruit is succulent B. atlas, cervical, axis, thoracic and lumbar E. it is an achene. C. atlas, axis, thoracic, cervical and lumbar D. atlas, axis, cervical, thoracic and lumbar 20. What type of fruit is formed from a single flower E. atlas, thoracic, cervical axis and lumbar. having several free carpels? A. multiple fruit B. Simple fruit C. Aggregate fruit 33. Which of the following diseases could be D. Dehiscent fruit E. Indehiscent fruit. exclusively associated with a river basin? A. Malaria B. Syphilis C. Onchocerciasis D. Cholera E. Poliomyelitis. 21. A 28g soil sample was heated to a constant weight of 24g. When further heated to red hot and cooled, 34. Which of the following represents the evolutionary it weighed 18g. What is the percentage of hurmus sequence in these plants? 1. Flowering plants, 2. in the soil? Ferns, 3. Mosses, 4. Algae, 5. Conifers. A. 22.2 B. 55.6 C. 75.0 D. 25.9 E. 35.7. A. 2à1à4à3à5 B. 5à4à3à2à1 C. 2à4à5à1à3 22. Which of the following diseases is NOT caused D. 3à2à4à5à1 E. 4à3à2à5à1 by a virus? A. Rinderpest B. Maize rust C. Newcastle disease 35. Which of the following will NOT allow osmosis to D. Swine fever E. Cassava mosaic disease. take place? A. pig’s bladder B. Cellophane C. Parchment paper 23. A centipede differs from a millipede by its D. Transparent polythene E. Cow’s bladder. A. colour B. numerous abdominal segments C. paired legs on each abdominal segment 36. Which of the following statements on the D. poison claws E. cylindrical body. mammalian circulatory system is Not true? A. Blood in the pulmonary artery is richer in 24. An organism having one pair of identical genes is oxygen content than blood in the pulmonary vein A. a heterozygote B. a hybrid C. an allelomorph B. The blood in the hepatic portal vein is the richest in D. a homozygote E. a diploid food substances. C. Blood flow is controlled by 25. Plants which can survive in places where the water valves in the veins D. Arteries are generally supply is limited are thicker and larger than veins. E. Fibrin helps in the A.bryophytes B.mesophytes C. xerophytes formation of blood clot. D.hydrophytes E. pteridophytes. 37. In a positive phototropic response of a coleoptile, the 26. Banana, plantain and pineapple can be grouped region of greatest curvature is brought about by the together because they A. movement of auxins away from the region of A. produce small seeds B. are multiple fruits curvature, B. even distribution of auxins in all C. produce suckers D. have runners E. have bulbils. parts of the coleoptile, C. inhibition of growth by auxins in the region of smaller curvature 27. One disease NOT caused directly by bacteria is D. concetrationn of auxins in the region of curvature E. A.malaria B. tuberculosis C. pneumonia D. tetanus absence of auxins in the coleptile. E. cholera. 28. In what order do the following structures develop 38. The tuber of cassava is NOT a stem tuber because it during the metamorphosis of the toad? 1. External gills A. is distended with food reserve B. has an aerial 2. Internal gills 3. Forelimbs 4. Hindlimbs 5. Mouth. shoot portion C. has other structures that A. 1 2 3 4 5 B.1 5 2 4 3 C. 1 3 4 5 D. 5 3 4 1 2 could be called roots D. lacks axillary buds E. 5 4 3 2 1. E. has a bark over its stored food. 29. The dental formular i 3/3: c 1/1: pm4/4: m2/3 = 42 represents that of a 39. The function of the ossicles (maleus, incus and A. rabbit B. full grown man C. young child stapes) in the mammalian ear is the D. dog E. sheep. A. transmission of vibrations B. regulation of 30. Which of the following statements is NOT true of pressures C. support of the inner ear insectivorous plants? D. maintenance of balance during motion A. They obtain part of their food by trapping and E. secretion of oil. feeding on insects B. They attract insects simply because of pollination. C. They can grow in soils poor 40. Which of the following instruments is used for in nitrogenous salts. D. They can supplement the determining turbidity of water? nitrogen supply by feeding on insects E. Examples A. Thermometer B. Secchi Disc C. Rain gauge include butterworts, sundews and pitcher plants. D. Hygrometer E. Wind vane. 31. Which of these worms is beneficial to man? 41. Which of the following is NOT a characteristic of A. Hookworm B. Tapeworm C. Roundworm monocot plants? D. Earthworm E. Guniea worm.  Uploaded on www.myschoolgist.com.ng A. occurrence of secondary thickening B. Parallel 47. When a Spirogyra cell is immersed in a salt solution venation C. Scattered vascular bundles more concentrated than its cell sap, it D. Floral parts arranged in threes, E. Periath is A. remains unchanged B. takes up water and burst usually insignifdicant C. absorbs a little water D. loses water and shrivel 42. Which sequence represnts the correct order of E. becomes turgid. organism in a food chain? 1. Toad, 2.Mucuna, 3. Grasshopper, 4.Snake, 5.Hawk. 48. Urea is produced in the A. 5 4 1 3 2 B. 1 2 3 4 5 A. liver, B. Ladder, C. spleen, D. kidneys. E. gall bladder C. 2 1 3 4 5 D. 2 3 1 5 4 E. 2 3 1 4 5 49. What is the genetic ration of the F2 generation if members 43. In Rhizopus, carbonhydrate is stored in the form of of F generation are allowed to self-pollinate? A. glucose B. paramylon C. glycogen D. starch E. oil A. 1tall: 3short B. 3 tall:1 short C. 1 tall: 1 short 44. Which of the following statements about the rate D. 4 shorts: 0 tall E. 4 tall:0 short of transpiration is INCORRECT? It is 50. The path taken by glucose from the ileum to the heart is A. dependent on temperature B. affected by changes in A. ileum hepatic portal vein hepatic artery vena light intensity C. unaffected by humidity cava heart. B. ileum hepatic portal D. dependent on air movement E. affected by artery hepatic artery venacave heart. availability of water. C. ileum hepatic portalvein vena cava heart 45. ‘Jointed skeleton’ is absent in the D. ileum hepatic vein vena cava heart. A. cockroach B. spider C. millipede D. snail E. ileum hepatic portal vein hepatic vein vena cava E. dragon fly. heart. 46. Which of the following statements about the definition of man is Incorrect? Man has A. more molars than incisors B. no diastema C. the same number of teeth on upper and lower jaws D. a total of thirty-two teeth E. a total of six molars. Biology 1984 1. The mouth part of the housefly are adapted for 6. Which of the following is INCORRECT? The A. lapping and sponging. B. sucking and chewing. prothallus of a fern C. piercing and sucking. D. chewing and lapping. A. is a flattened heart-shaped structure. E. biting and chewing. B. is green because its cells contain chloroplasts C. is the dominant plant D. bears the sexual organs 2. The male toad differs from the female by having E. is attached to the ground by numerous rhizoids. A. vocal sacs. B. shorter hind limbs. C. longer fore limbs. D. bulging eyes. 7. Which of the following cell constituents is NOT E. nictating membrane. common in both plants and animals? A. Mitochondria B. Chloroplasts 3. Mosses, liverworts and ferns can be grouped C. Ribosomes D. Golgi apparatus together because they E. Vacoules. A. are all equatic plants. B. all grow in deserts. C. are seedless plants. D. have undifferentiated plant 8. The character-producing factors in living organisms are bodies. E. all produce colourless flowers. A. chromomeres B. alleles C. chromatids D. chromosomes E. genes. 4. Spirogyra and Mucor can be grouped together as Thallophyta because. 9. A mixture of mercurous and mercuric nitrates is added A. they are unicellular organism B. their spores to a food substance. A white precipitate is formed could be dispersed by wind C. they are capable which on gentle heating turns red. The food of living independent lives D. they reproduce sexually substance is only E. their bodies are made up of thallus and A. protein B. oil C. Carbohydrate filaments alternatively. D. Fat E.Fatty acid. 5. Which of the following invertebrates does NOT 10. The mammalian organ through which nourishment possess antennae? and oxygen diffuse into a developing embryo is called A. Centipede B. Crustacean C.Millipede A. amnion B. chorion C. umbilical cord D. Insect E. Spider D. oviduct E. placenta  Uploaded on www.myschoolgist.com.ng 11. Fig 1 represents a quill feather. The structure labelled 20. A man with a normal haemoglobin (AA) marries a “M” is the woman who has sickle-cell haemoglobin (SS). A. quill B. rachis C. superior umbilicus They have a child who has sickle-cell trait. Which D. inferior umbilicus E. aftershaft of the following genotypes could be associated with the child’s haemoglobin ? A. AA B. OO C. AO D. AS E. SS 21. 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? A. Mercurous nitrate B. Copper sulphate C. Mercuric nitrate D. Sodium carbonate E. Ammonium hydroxide 12. Osmosis can be defined as the movement of 22. The removal of a man’s pancreas by surgical A. molecules from solution of high concentration operation can affect only the digestion of to low concentration B. molecules from solution of A. starch B. starch, protein and fats low concentration to ]high concentration C. oils and fats D. proteins C. water from solution of high concentration to low E. carbohydrate and fats. concentration D. Water across a semi-permeable membrane from solution of low concentration to high 23. The parts used by tapeworm to fasten itself to the concentration E. water across a semi-permeable host’s intestine are the membrane from solution of high concentration A. neck and suckers B. hooks and suckers to low concentration C. rostellum and suckers D. young proglottis and neck E. rostellum, 13. Which of the following statements is NOT true of hooks and suckers. enzymes? They A. are proteins B.need cofactors to activate them Use Fig 2 to answer questions 24 - 25 C. are sensitive to hydrogen ion concentration D. are specific in their action E. can withstand high temperatures. 14. The dorsal and anal fins of fish are used for A. upward movements B. controlling rolling movements C. downward movements D. steering E. buoyancy. Fig 2. transverse section of a fowl’s egg 15. Exoskeleton is NOT found in the A. maggot B. mosquito larva C. earthworm 24. The young chick is formed from D. caterpillar F. termite A. 3 B. 3 and 4 C. 1,3 and 5 D. 2 E. 4 16. Blood clotting is initiated by 25. Which parts provide food for the developing chick? A. leucocytes B. platelets C. haemolymph A. 2 and 3 B. 4 and C. 3 and 4 D. haemoglobin E. erythrocytes D. 2 and 5 E. 1 and 2 17. Pepsin is a digestive enzyme which breaks 26. Which of the following types of vertebrate occur A. cellulose into glucose molecules in equal numbers in the rabbit, rat and man? B. carbohydrates into simple sugars A. Caudal B. Thoracic C. Lumbar C. protein into peptones D. fats into glycerol D. Cervical E. Sacral and fatty acids E. sucrose into glucose and fructose. 27. Which of the following statements is NOT true of 18. Anaerobic respiration in yeast produces the piliferous layer of a root? It A. carbondioxide and ethanol B. carbondioxide and A. has a very thin cuticle B. is the outermost layer of the cortex C. may bear root hairs water C. carbondioxide and oxygen D. breaks down as the root ages D. carbondioxide and glucose E. ethanol and water E. is replaced by cork in old roots. 19. Underground stems which grow horizontally 28. A flowering plant is monoecious if through the soil are A. the androecium is found on one plant A. blubs B. rhizomes C. runners B. the gynoecium is monocarpous C. it produces essential organs D. the gynoecium D. corms E. stolons and androecium are on the same plant E. the flowers are unisexual  Uploaded on www.myschoolgist.com.ng 29. How many nuclei are found in a pollen tube during 41. Green plants are important in the ecosystem fertilization? because they are A. 2 B. 3 C. 5 D. 6 E. 7 A. primary consumers B. producers C. decomposers D. secondary consumers 30. Which of the following is NOT a waste product of plants? E. scavengers. A. Tannis B. Oxygen C. Carbondioxide D. Sap E. Alkaloids 42. An anenometer is an instrument for measuring A. relative humidity B. altitude C. wind speed 31. If an animal is very active and has good muscular D. turbidity E. salinity. control, it is likely to have well-developed A. olfactory lobes B. cerebral hemispheres 43. Which of the following is NOT regarded as a C. optic lobes D. cerebellum E. spinal cord pollutant on land or in the air? A. Noise B. Smoke C. Sulphur dioxide 32. Which of the following adaptations is NOT D. Carbon monoxide E. Nitrogen concerned with the flight of birds? A. Streamlined shape B. Presence of powerful muscles 44. Which of the following groups of factors is C. Reduced body weight D. Broad sternum completely abiotic? E. Webbed feet. A. salinity, tide, plankton, turbidity B. Temperature, pH, soil insect 33. The transect method can be used in ecology to show the C. Wind, altitude, humidity, light A. number of plants and animals in a habitant D. Conifers, winds, pH, rainfall B. population of a plant species E. Soil, water, bacteria, salinity C. distribution of organisms along a line D. heights of trees in a section of a forest 45. Which of the following lists of diseases, their E. number of young plants across a forest. causes and transmission is CORRECT? A. Cholera, virus, severe diarrhoea, infected water. 34. Asexual reproduction does NOT occur in B. Malaria, protozoan, high fever, contact with infected A. Mucor, Spirogyra and Paramecium person C. Syphilis, virus, veneral disease, sexual B. Penicillium, Paramecium and Amoeba intercourse D. Smallpox, virus, skin with blister, C. Mucor, Rhizopus and penicillium close contact with infected person. E. Sleeping D. Amoeba, spirogyra and Mucor sickness, bacteria, tiredness, headaches and dozing, E. Rhizopus, Ascaris and Amoeba. tsetse fly bite 35. Fehling’s solution will readily change colour from 46. Erosion can be reduced along a slope by blue to a reddish colour when it is A. ridging across slope B. ridging up slope A. mixed with sugar solution in the cold C. ridging down slope D. crop rotation B. warmed or heated by itself E. bush fallowing system. C. mixed with reducing sugar in the cold D. warmed or heated with a complex solution E. warmed with a solution of reducing sugar. 47. If a handful of soil is shaken with water and left to settle, the soil particles will settle from light to 37. Normally the flow of blood is NEVER from heavy particles as follows: A. artery to arterioles B. arterioles to capillaries A. humus, clay, silt, sand, stones B. humus, C. capillaries to venules D. arterioles to the artery silt, clay, sand, stones C. humus, clay silt, stones, sand D. humus, sand, silt, clay, stones E. venules to the vein E. clay, humus, silt, sand, stones. 38. Heat produced in tissue respiration in plants is 48. Denitrifying bacteria in nature liberate gaseous A. a chemical from of energy B. the only form of energy nitrogen directly from C. the main form of energy D. a useful form of energy A. ammonium salts B. soil nitrates E. a waste from of energy. C. thunderstorms D. soil nitrites E. plant and animal proteins. 39. The axial skeleton of a mammal does not include the bones of the 49. Leaching is A. skull B. tail C. limbs D. back E. neck. A. washing away of humus from the soil surface B. reduction of soil aeration by pressure 40. Which of the following sequences represents the C. soil erosion by means other than rainfall process of blood clotting? 1. Fibrin forms a network of D. loss of organic matter due to exposure to direct sunlight E. washing out of chalk and limestone threads 2 Red blood cells are caught and a clot is formed from upper layers of soil by heavy rains 3. Fibrinogen in plasma changes into solube fibrin 4. Blood is exposed to air. 50. The process of soil erosion is usually from A. 4,3,2,1 B. 4,3,1,2 C. 3,1,4,2 D. 1,2,3,4 A. rill sheet gully B. gully rill sheet E. 3,1,2,4. C. sheet gully rill D. sheet rill gully E. rill gully sheet  Uploaded on www.myschoolgist.com.ng Biology 1985 1. In Spirogyra, the pryrenoid 12. A group of similar cells performing the same A. excrete waste products B. is suspended by function is cytoplasmic strands C. is mainly used for A. an organ B. a system C. a tissue respiration D. usually contains starch D. an organelle E. an enzyme. E. makes the plant slimly to touch. 13. Which of the following is common to a dicotyledonous 2. In which of the following groups of animals are stem and a monocotyledonous root? flagella and cilia found? A. Medullary rays B. Central pith A. Flatworms B. Annelids C, Coelenterates C. Wide cortex D. Narrow cortex D. Protozoa E. Nematodes E. Pericyclic fibres. 3. Which of the following is seed bearing? 14. Which of the following represents the sequence A. Mosses B. Whistling pine of protein hydrolysis? 1.Polypeptides 2.Amino C. Algal filamentsD. Livewort acids 3. Proteins 4. Peptones E. Fern fronds. A. 3à1à2à4 B. 3à2à4à1 C. 3à4à2à1 D. 3à4à1à2 E. 3à1à4à2 4. Each of the following is an arthropod EXCEPT the A. crab B. spider C. snail D. millipede 15. A food substance which produces red colouration E. cockroach with Sudan III contains A. protein B. sugar C. starch 5. In fish the sense organs which detect movements D. cellulose E. fat. in the water are located within the A. gills B. operculum C. nostrils D. median fins 16. If calcium is deficient in food this may cause E. lateral line. A. anaemia B. retarded growth C. sterility D. goitre E. beri-beri 6. Euglena is an autotrophic organism because it A. has flagella B. has plant and animal features 17. Partially digested food ready to leave the stomach C. is found in water D. can manufacture its food is referred to as E. moves fast. A. chyme B. curd C. glycogen D. paste E. roughage 7. Which of the following is NOT true of Mucor? It A. contains chlorophyll B. grows saprophytically 18. The function of lymph nodes is to C. bears spores in sporangium A. supply oxygen B. filter out bacteria D. consists of hyphae C. form red blood D. supply amino acids E. reproduces by conjugation E. supply simple sugars 8. Byrophytes are different from flower because they 19. The vein which returns blood from the head and A. live in moist habitats B. are small plants arms to the heart is called C. reproduce sexually and a sexually A. aorta B. inferior vena cava C. superior vena cava D. have small leaves D. pulmonary vein E. pulmonary artery. E. have no vascular tissues. 20. Blood platelets are important because they 9. At what stage in the life history of a toad is its A. are amoeboid and nucleated B. produce mode of breathing similar to that of a fish? antitoxins C. produce antibodies A. Tadpole stage B. External gill stage D. digest harmful bacteria E. release thrombin C. Adult stage D. Internal gill stage for blood clotting. E. Larval stage. 21. If a child can receive blood from all donors, he 10. In lower plants like mosses, the structure which performs belongs to the blood group the functions of roots of higher plants is called A. O B. A C. B D. AB E. AS. A. root hairs B. rootlets C. hyphae D. rhizoids E. thalli. 22. Which of the following events does NOT occur during anaerobic respiration of glucose? 11. In an angiosperm leaf, the xylem is A. Muscle cell produce lactic acid B. Carbon A. beside the phloem B. surrounded by the phloem dioxide is produced C. Milk bacteria produce C. above the phloem D. around the phloem lactic acid D. Energy is not produced E. in separate bundles from the phloem. E. Germinating seeds produce alcohol.  Uploaded on www.myschoolgist.com.ng 23. Identify which of the following are characteristics of 34. The characters by which an organism is recognized are the vertebrate respiratory surface 1. Moist 2. Vascularized termed its 3. Semipermeable 4. Freelypermeable 5. Dry A. phenotype B. genotype A. 1,2,3 B. 1,2,5 C. 2,3,5 D. 2,4,5 E. 1,3,5. C. morphology D. anatomy E. physiology. 24. In mammals, the function of the sebaceous gland is to 35. The hereditary material in a cell is known as A. produce sweat B. secrete sodium A. ADP B. CNS C. RNA D. ATP E. DNA. C. secrete water D. produce an oily substance E. manufacture vitamin D for the skin. 36. A young plant showing yellow leaves is likely to be deficient in 25. Which of the following organs regulates the A. calcium B. magnesium C. potassium amount of amino acids and glucose in the body? D. boron E. molybdenum. A. Kidney B. Liver C. Pancreas D. Spleen E. Stomach. 37. Germination which results in the cotyledons being brought above ground is called Use the diagram below to answer questions 26 and 27 A. hypocotyls B. epicotyl C. epigeal D. hypogeal E. plumule. 38. The mammalian endocrine system is responsible for A. transmitting impulses B. regulating body temperature C. regulating osmotic pressure of blood D. chemical co-ordination E. the manufacture of blood. 39. An old man is likely to be long-sighted because Fig. 1 age effects the A. optic nerves B. retina C. ciliary muscles 26. Bowman’s capsules are located in the part labelled D. cornea E. aqueous humour. A. 1 B. 2 C. 3 D. 4 E. 5 F. 6 40. In a mammal, stimulus is transferred from the receptor 27. Re-absorption of useful materials takes place in muscle to the central nervous system through the the parts labeled. A. motor neurons B. effector muscles A. 1 and 3 B. 3 and 5 C. 5 and 6 C. dendrites D. sensory neurons E. synapses. D. 6 and 7 E. 2 and 4 41. A relationship between living organisms which is 28. Movements and positions of the head in man are of mutual benefit is detected by the A. parasitism B. saprophytism C. ecosystem A. cochlea B. malleus C. utriculus D. symbiosis E. commensalisms. D. semicircular canals E. outer 42. Which of the following food chains is in the correct 29. The appendicular skeleton is made up of the sequence? A. limbs B. skull and limbs C. phalanges A. Weeds Tadpoles Beetles Fish Man D. ulna and radius E. girdles and limbs. B. Weeds Tadpoles Fish Beetles Man. C.Tadpoles Beetles Weeds Man Fish 30. The maize grain is a fruit and not a seed because it D. Man Fish Beetles Tadpoles Weeds A. has a large endosperm B. is formed from an ovary E. Fish Beetles Tadpoles Weeds Tadpoles. C. is a monocotyledon D. has no plumule and radicle E. has a hypogeal germination. 43. The primary and secondary hosts respectively of bilharzia are 31. If a flower is protandrous then it A. fish and man B. man and dog C. snail and man A. must be unisexual B. has an undeveloped D. man and snail E. fish and snail anroecium C. has no anroecium D. must be insect pollinated E. can prevent self- 44. Which of the following is NOT caused by bacteria? pollination. A. Cholera B. Gonorrhoea C. Tuberculosis D. Onchocerciasis E. Typhoid. 32. For pollen to be released in Crotalaria the insect must depress the 45. Tsetse fly is harmful to man because it is associated A. wing B. keel C. standard D. antepetalous with the spread of stamen E. antesepalous stamen. A. river blindness B. malaria C. sleeping sickness D. leprosy E. dysentery. 33. Irish potato is a A. bulb B. tap root C. rhizome D. root tuber E. stem tuber.  Uploaded on www.myschoolgist.com.ng 46. Soil erosion CANNOT be controlled by 49. Atmospheric nitrogen is directly replenished in A. planting cover crops B. contouring of nature through sloping ground C. terracing of slopes A. the activities of denitrifying bacteria D. laying of mulch E. burning of bush B. the breakdown of ammonium salts in the soil C. the activities of nitrifying bacteria 47. Water retention is highest in soils which are rich in D. the activities of nitrogen-fixing bacteria in root nodules A. sand, poor in humus and devoid of clay E. egestion, death and decay B. clay and sand, but poor in humus C. clay and humus, but poor in sand 50. The initial volume of water poured into a bag of D. clay, poor in humus and devoid of sand dry soil was 50ml and the amount that drained E. Sand and humus, but poor in clay through was 35ml. The percentage water content of the fully soaked soil is therefore 48. The origin of mineral particles in the soil is A. 46.7 B. 25.0 C. 20.0 D. 30.0 E. 58.3. A. humus B. water C. micro-organisms D. weathered rock E. organic matter Biology 1986 1. Viruses are regarded as non-living because they 10. When the original king and queen of termites die, A. can neither reproduce asexually nor sexually they are replaced by B. cannot survive in their respective environments A. the king and queen of another colony C. do not possess characteristics to the next B. some adult reproductives from the same colony D. can neither respire nor excrete. C. some adult workers which are specially fed to breed. D. Developing nymphs nurtured as secondary 2. Which of the following pairs are fully adapted to reproductives. terrestrial life? A. Ferns and algae B. Ferns and mosses 11. The male cockroach differs from the female by having C. Bryophyte and flowering plants. D. Flowering plants and conifers. A. mandibles B. a pair of styles C. spiracles D. a pair of cerci. 3. Which of these animals is radically symmetrical? A. Squid B. Hydra C. Snail D. Cockroach. 12. The fins making up the limbs of the bony fish are A. caudal and ventral B. ventral and pelvic 4. Which of the following has cones? C. pelvic and pectoral D. pectoral and dorsal. A. Angiosperm B. Gymnosperm C. Pteridophyte D. Bryophyte. 13. The stem differs from the root in having the xylem and phloem strands 5. For effective functioning of a bird’s quill feather, A. on the same radii B. scattered C. on alternate radii hooks fit on the ridges of the D. towards the pith. A. vane B. rachis C. barbules D. barbs. 14. Oxygen liberated during photosynthesis has been demonstrated to come from 6. Which of the following is NOT true of Spirogyra? A. carbon dioxide B. air C. water D. chlorophyll. A. Reproduces by conjugation B. Reproduces by fragmentation C. Consists of branched filaments 15. Which of these is a trace element? D. Consists of unbranched filaments A. Iron B. Copper C. Calcium D. Sulphur. 7. Which of the following lacks chaetae, tentacles 16. The main organic substances found in the human and antennae? body are A. Snail B. Crab C. Millipede D. Earthworm. A. carbohydrates, proteins and salts B. salts, fats and proteins C. fats, carbohydrates and 8. Incomplete metamorphosis in the proteins D. salts, fats and carbohydrates. A. butterfly B. grasshopper C. mosquito D. housefly 17. Which of the following elements is essential for the formation of haemoglobin? 9. Fishes are cold-blooded because their body A. Sodium B. Potassium C. Calcium D. Iron. temperature is A. constantly low B. constantly high 18. The severe deficiency of vitamin C leads to C. dependent on that of their surroundings A. kwashiorkor B. beriberi C. pellagra D. scurvy D. regulated at will  Uploaded on www.myschoolgist.com.ng 19. In addition to the high calories derived from fats A. keep moving so that the venom will ooze out with and oils, they are bleeding B. wash the wound with water containing A. used in producing new cells B. necessary for enzyme antiseptic C. bandage the wound so that germs do formation C. used as insulators from cold not get in through it D. keep still and apply a D. required for growth tourniquet above the wound. 20. The extract from a food substance reacting with 30. Deamination occurs in the sodium hydroxide and copper sulphate solutions A. kidney B. pancreas C. spleen D. liver. will produce violet to purple coloration if A. fats are present B. carbohydrate is present 31. In the mammalian skin, melanin and keratin are C. protein is present D. reducing sugar is present. contained in the A. sebaceous gland B. sweat gland 21. The three important organs that are situated close C. subcutaneous layer D. malpighian layer. to the stomach are A. kidney, liver and gall bladder B. pancreas, liver and 32. Two main distinguishing features of the cervical kidney C. liver, kidney and spleen D. gall bladder, vertebra are the presence of pancreas and spleen. A. short neural spine and vertebraterial canal B. prezygapophysis and cervical ribs 22. Evidence that a tooth is a living part of the C. large centrum and cervical ribs mammalian body can be found within the D. vertebraterial canal and large centrum A. gum B. pulp cavity C. cement D. enamel. 33. Nastic movement is 23. Blood circulation in a mammal is said to be double A. response to light stimulus B. non-directional because C. directional D. response to internal stimulus A. it passes twice through the heart in the complete circuit B. it moves in both arteries and veins Use the figure below to answer questions 34 to 36 C. it circulates in both the heart and other organs D. the heart contains auricles and ventricles 24. Which is the correct order of water loss from the leaf? 1 Mesophyll 2 Veins 3 Substomatal cavity 4 Stomata A. 3 2 1 4 B. 2 3 1 4 C. 2 1 3 4 D. 1 2 3 4. 25. The aperture between the left auricle and the left ventricle is guarded by the A. auricular valve B. tricuspid valve C. ventricular valve D. bicuspid valve. Vertical section of a maize grain 26. A major limitation in the use of the potometer for 34. Which of the labelled parts will develop into a measuring the rate of transpiration is that new maize plant? A. it is made of breakable glass material A. 2 B. 3 C. 4 D. 5. B. it measures the rate of water intake C. it measures the rate of water loss through the stem 35. The structure labelled 1 is the only D. the movement of the air bubble in the A. plumule B. radicle C. cell membrane potometer cannot be timed accurately. D. seed coat 27. Which of the following statements is not correct 36. The main function of the structure labelled 2 is to with respect to inhalation in mammals? A. protect the inner parts of the seed A. intercostal muscles contract B. diaphragm is raised B. nourish the embryo and the growing parts C. ribs are raised D. pressure of the thoracic cavity C. keep the inner parts moist decreases. D. maintain the shape of the seed. 28. The equation that can be used to summarize the 37. Gestation in mammals is the period process of anaerobic breakdown of sugar is A. required for growth after birth A. C6H12O6+2C2H5OH + 2CO2 B. between the formation of the foetus and birth B. 6CO2 + 6H2O ’! C6H12O6 + 6O2 C. of development from zygote to birth C. C6H12O6 + 6O2 ’! 6CO2 + 6H2O+ energy D. before the formation of the zygote. D. C6H12O6 ’! 2C2H5OH + 2CO2 + energy. 38. If a woman who is a carrier of sickle cell trait (AS) 29. If a person is bitten by a snake on the leg, it is married a man who is a sickler (SS) and they had advisable for the person four children how many of them would be normal A. Three B. Two C. One D. None  Uploaded on www.myschoolgist.com.ng 39. Which of the following is an example of discontinuous variation? 45. Which of the following ecological factors are A. Skin coloration B. Left-handedness common to both terrestrial and aquatic habitats? C. Body weight D. Height A. Rainfall, temperature, light and wind B. Salinity, rainfall temperature and light 40. The hormone which regulates the amount of C. Tides, wind, rainfall and altitude glucose in the blood is called D. Ph, salinity, rainfall and humidity A. adrenalin B. auxin C. insulin D. thyroxine. 46. In a community, bacteria and fungi are referred to as A. producers B. decomposers C. scavengers 41. An instrument that can be used to demonstrate D. consumers phototropism and geotropism in plants is the A. auxanometer B. potometer C. klinostat 47. The swollen shoot disease of cocoa tree is caused by a D. photometer. A. virus B. fungus C. bacterium D. protozoan 42. In an ecosystem, animals which feed directly on 48. A large percentage of tropical soils tend to be plants are called acidic because they A. secondary consumers B. primary consumers A. contain large quantities of potash B. contain large C. producers D. predators quantities of lime C. lose a high proportion of their organic matter to running water D. lose lime and 43. In an agricultural ecosystem, the biotic component potash from the top soil through rain action consists of A. crops, pest and beneficial insects B. crops, 49. The following are methods of soil conservation EXCEPT temperature and humidity C. pests, beneficial A. contour terracing B. strip cropping insects and water D. crops, water and soil. C. contour ploughing D. mixed grazing 44. Which of these diseases CANNOT be prevented 50. Samples of different soil types are packed in glass by immunization? tubes whose lower ends are plugged with cotton A. Poliomyelitis. B. Tuberculosis wool. If these tubes are suspended in a trough of C. Cholera D. Onchocerciasis water, water will rise highest after a few hours in A. sand B. loam C. clay D. humus. Biology 1987 1. The function of endoplasmic reticulum is 6. A good example of a diploblastic organism is A. protein synthesis B. intracellular transport of materials A. Amoeba B. Hydra C. Earthworm D. Roundworm. C. digestion and destruction of foreign bodies D. production of energy from glucose. 7. The function of the clitellum in the earthworm is to A. aid digestion B. prevent desiccation C. assist 2. Which of the following features of Euglena is locomotion D. secrete cocoon. found only in animals? A. Paramylum granules. B. Flagellum C. Pellicle 8. The crayfish is an arthropod because D. Pyrenoid. A. its body consists of a cephalothorax and an abdomen B. it has a pair each of antennae and antennules 3. An organism found on a bare rock surface has C. every segment of its body carries a pair of appendages features of algae and fungi. The organism is D. its body is covered with an exoskeleton made of A. an empiphyte B. a lichen C. a bryophyte D. a fern. chitin. 4. In a plant exhibiting alternation of generations, 9. The hypha of Rhizopus is said to be coenocytic the diploid multicelluar stage is known as because it A. gametophyte B. spermatophyte C. holophyte A does not contain chlorophyll B. has no cross walls D. sporophyte. C. is vacuolated D. stores oil globules. 5. A characteristic that distinguishes bryophytes 10. In most true ferns sporangia are grouped into from flowering plants is the A. indusium B. fonds C. prothalli D. sari. A. possession of true stems and leaves B. ability to reproduce asexually C. absence of vascular tissues D. ability to grow in moist habitats.  Uploaded on www.myschoolgist.com.ng 11. In the reproduction of mosses, water is essential because 21. One cubic centimeter of lymph is richer than an A. they live in moist habitats B. they cannot equal volume of blood reproduce without water C. the male gametes A. erythrocytes B. leucocytes C. amino acid must swim to fertilize the ovum D. they D. glucose. produce spores. 22. The oxidative part of the respiration process takes 12. In tapeworm, the two structures that run through place in the the length of the body are the A. mitochondria B. ribosomes C. endoplasmic A. nerve cord and the excretory duct B. sperm reticulum D. golgilbodies. duct and the nerve cord C. genital pore and the excretory duct D. sperm duct and the genital pore. 23. Fatigue of leg muscles may occur after riding many kilometers on a bicycle because of 13. Which of the following is NOT a characteristic of snails? A. insufficient glucose B. excess carbon dioxide A. Bilaleral symmetry B. Chitinous exoskeleton C. excess protein D. insufficient oxygen. C. Muscular foot D. Soft unsegmented body in a mantle. 24. The function of the loop of Henle is to 14. In the life history of a butterfly, destruction of A. increase the flow of urine B. concentrate amino crops is caused by the acids in the kidney tissue C. concentrates sodium A. maggot B. nymph C. caterpillar D. pupa. chloride in the medulla of the kidney D. increase the volume of urine. 15. The correct sequence of tissues in the anatomy of a young dicotlydonous stem from the inside to Use the information in the graph below to the outside is answerquestion 25 and 26 A. pith, phloem, cambium, xylem, parenchyma, collencyma and epidermis B. xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis C. pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis D. phloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis. 16. Secondary thickening is initiated in a dicotyledonous stem by the 25. Which of the plants is likely to have broad leaves A. xylem parenchyma B. secondary phloem with thin cuticle? C. endodermis D. cambium. A R. B. S C. T D. U 17. In demonstrating the importance of mineral elements in 26. Which of the plants is likely to be a desert species? the plants, the culture bottle must be darkened to A. U B.T C.S D. R. A. prevent algal growth in culture solution B. allow root growth C. prevent breakdown of mineral 27. Sclerenchyma cells are lignified to elements D. prevent photosynthesis in the root. A. strengthen and support the plant B. transport synthesized food C. conduct water and salt 18. The vitamin which is important in the formation of D. protect the plant from injury. the retina pigments is A. vitamin A B. vitamin B C. vitamin C 28. The pineapple fruit is best described as D. vitamin D. A. aggregate, succulent and indehiscent B. aggregate, succulent and indehiscent 19. Which of the following lists of organs is directly C. multiple, succulent and indehiscent involved in nutrition? D. multiple, succulent and dehiscent. A. Oesophagus, bronchus, stomach, pancreas and anus B. Spleen, pharynx, duodenum, jejunum and rectum, C. Teeth, oesophagus, ileum lungs and large intestine, D. Salivary gland, liver, stomach, villi and colon. 20. In the standard experiment to show that oxygen is given off during photosynthesis, sodium bicarbonate is used to A. neutralize the acid in water B. supply mineral salts to 29. The flower shown above is water plant, C. supply carbondioxide for A. complete, regular, hermaphroditic with inferior ovary photosynthesis D. Kill micro-organism in water. B. incomplete, regular, staminate with inferior ovary C. complete regular, hermaphroditic with inferior ovary D. incomplete, irregular, pistillate with superior ovary.  Uploaded on www.myschoolgist.com.ng 30. A flower showing radial symmetry is said to be 43. The ratio of carriers to sicklers in the F1 generation A. pentamerous B. protandrous C. protogynous derived from a parental cross of two carriers of D. actinomorphic. haemoglobin S gene is A.3:1 B. 1:3 C. 2:1 D. 1:2 31. A samara differs from a cypsela by having A. an exended pericarp B. a hard pericarp 44. In which of the following crosses will all the C. a pericarp fused with the seed coat female offspring be colour blind? D. some hairy outgrowths on the pericarp. A. colour blind mother x colour blind father. B. colour blind mother x normal father 32. The plantain reproduces asexually by C. carrier mother x colour blind father. A. suckers B. buds C. fragments D. spores. D carrier mother x normal father. 33. Growth can best be determined in a population of 45. Which of the following relates to edaphic factors? Spirogyra by measuring the A. The structure of the earth’s surface B. The A. total lengths of the filaments B. total widths of influence of living organisms on each other. the filaments C. rate of photosynthesis in the C. Temperature, rainfall and humidity population D. dry weight of the organism. D. The influence of soils on plants and animals. 34. Most cells in higher animals retain their power of 46. Epiphytes growing on the branches of trees division EXCEPT provide an example of the relationship known as A. lymphocytes B. nerve cells C. malpighian cells A. parasitism B. commensalisms C. aprophytism D. germ cells. D. holophytism. 35. A severe deficiency of thyroxin results in 47. Poliomyelitis is an infectious disease caused by A. diabetes mellitus B. sexual underdevelopment A. virus B. protozoan C. bacterium D. fungus. C. cretinism D. gigantism. 48 One of the functions of UNICEF is to 36. The growth of a coleoptile towards unilateral A. prevent and control major diseases B. prevent light source is due to disease outbreak by administering vaccines A. rapid rate of photosynthesis B. unequal C. improve the health and nutrition of children distribution of auxin C. the effect of geotropism and nursing mothers D. monitor environment D. the effect of photolysis. pollution.. 37. The sequence of ear ossicles from the fenestra ovalis is 49. Nitrifying bacteria are important because they A. malleus, incus and stapes B. malleus, stapes and A. release nitrogen to the atmosphere B. convert incus C. stapes, incus and mallcus D. stapes, malleus Atmosphere nitrogen to ammonia C. combine and incus. ammonia with nitrogen D. oxidize ammonium salts to nitrates. 38. The centre for controlling body temperature in the brain is the 50. The process by which lime is added to clay soils is A. cerebrum B. cerebellum C. medulla known as D. hypothalamus. A. sedimentation B. flocculation C. leaching D. manuring 39. Unlike auxins, gibberellins A. induce the formation of adventitious roots B. do not affect leaf and fruit abscission C. cannot stimulate stem elongation D. are quite effective as herbicides. 40. A gene which expresses itself only in the homozygous condition is A. a mutant B. dominant C. recessive D. lethal. 41. An example of monohybrid inheritance in man is A. astigmatism B. cretinism C. hyperthyroidism D. albinism. 42. 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 A. blue and wrinkled B. round and yellow C. wrinkled and yellow D. round and greenish-yellow.  Uploaded on www.myschoolgist.com.ng Biology 1988 1. The function of ribosomes in cells is 11. Which stage is found in the muscle of an infected pig? A. protein synthesis B. starch synthesis A. 3 B.4 C.5 D.6 C. transport of materials D. lipid storage. 12. The long and coiled intestine of a young tadpole is 2. Which of the following structures is common to an adaptation to its Euglena, white blood cell and Amoeba? A. herbivorous diet B. carnivorous diet C. aquatic A. Vacuole B. Cell wall C. Cilia D. Cell membrane. habitat D. insectivorous habit. 3. The term ‘Thallophyta’ refers to 13. Lung hooks are used for respiration in A. ferns and mosses B. algae and fungi C. mosses and A. spiders B. insects C. millipedes D. snails. liverworts D. fungi and ferns. 14. Insects and millipede have many features in common 4. The following organisms are hermaphrodites EXCEPT EXCEPT A. snail B. taenia C. schistosoma D. earthworm. A. exoskeleton B. jointed, appendages C. Compound eyes D. segmented body 5. Parasitic forms are NOT found among A. platyhelminthes B. nematodes C. moluscs 15. The major function of the swim-bladder in fishes is D. annelids. A. breathing B. buoyancy C. swimming D. diving 6. Which of the following sets of organism represents the correct trend from simple to complex structural 16. Which of the following statement gives the BEST organization? 1 Mollusca 2 Platyhelminthes 3 description of bark? Nematoda 4 Protozoa A. Tissues outside the vascular cambium A. 4 1 2 3 B. 4 3 2 1 B. Cork-like tissues found only in stems C. Brown C. 4 2 1 3 D. 4 2 3 1. tissues never found in primary growth D. Cork-like tissues of old trees. 7. Spirogyra, Euglena and Chlamydomonas share many characteristics EXCEPT 17. In the transverse section of the leaf of maize vascular A. nutrition B. reproduction C. mobility bundles are arranged in D. irritability. A. a row B. one circle C. alternate positions D. two circles. 8. The prothallus of a fern is equivalent to the 18. If an animal has diastema, it would NOT possess gemaetophyte generation of a moss because it A. incisors B. cannines C. premolars D. molars A. is inconspicuous B. has rhizoids C. bears sexual organs D. is multicellular. 19. If the gall bladder of a mammal is damaged, which of the following will be most seriously affected? 9. What is the function of trichocyst in Paramecium? A. Glycolysis B. Digestion of starch C. Digestion of fats and A. Movement B. Defence C. Excretion D. Reproduction. oils D. Digestion of proteins. Use the diagram below to answer quetions 10 and 11 20. Which of the following will be first digested if ingested at the same time? A. Cooked beans B. Cooked rice C. Cod liver oil D. Roasted beef. 21. If the phloem of a healthy plant is killed by heat treatment the A. 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. 22. In the mammalian respiratory system, exchange of gases occurs in the A. lungs B. bronchi C. bronchioles D. alveoli. 23. The main waste products formed in plant are A. alkaloids, tannins and resins B. water, alkaloids and carbondioxide 10. At which stage in this cycle can man be infected? C. water, carbondioxide and oxygen. A. 2 B.4 C. 5 D.6.  Uploaded on www.myschoolgist.com.ng 24. In the kidney the malpighian corpuscle is located in 37. A red - coloured flower when crossed with a white- the coloured one produced pink flowers. This is an A medulla B. helium C. cortex D. pelvis. example of A. complete dominance B. blending inheritance 25. The skin, through the sweat glads, functions as C. interaction of genes D. back crossing. A an excretory organ B. a respiratory organ C. a sensory organ D. a protective organ. 38. The turbidity of a pond can be measured using the A. anaemometer B. secchi disc C. theodolite 26. Parenchyma cells serve as supporting tissue when D. hydrometer. they A. contain chloroplasts B. have crystals C. become flaccid D. become turgid. 39. The most important substances necessary for the maintenance of life are carbon , oxygen 27. Taxism differs from tropism because A. hydrogen , soil and enzymes B. hydrogen, salt A. the whole organism is affected B. it is a directional and water C. nitrogen, salt and soil movement C. it is a response to multi-directional stimuli D. D. nitrogen, salt and water. part of the organism is affected. 40. If an organism obtains its food by means of 28. A dry dehiscent fruit which breaks up into one haustoria, it is said to be seeded parts is a A. holophytic B. heterophytic C. Saprophytic A. schizocarp B. capsule C. follicle D. legume. D. Parasitic. 29. Airspaces are characteristic of seeds or fruits dispersed 41. Which of the following relationship involves only A. birds B. water C. wind D. explosive mechanism. one organism? A. Saprophytism B. Commensalism C. Parasitism 30. In vegetative propagation, which of the following D. Symbiosis. requires part of another plant to develop? A. Scion B. Bulb C. Rhizome D. Sucker 42. Which of the following has the greatest influence on the distribution of animals in marine and fresh 31. Which of these plant groups are normally water habitats? propagated by asexual means? A. pH. B. Salinity C. Water current D. Turbidity A Banana, yam, pineapple and cassava B. Yam, cassava , rubber and banana C. Yam, cassava, 43. Which of these groups of animals is likely to be orange and banana, D. Banana, cassava, coffee found in fresh water? and pineapple. A. Blood worm, pond skater and scorpion B. Blood worm, pond skater and dragonfly larva C. Pond 32. In a mammal, the placenta performs functions similar skates scorpion and dragonfly larva. D. Pond skater, to those of the blood worm and ant-lion. A. lungs, kidneys and digestive system B. lungs, heart and nervous system C. liver, intestines and reproductive system D. intestines, heart and digestive system. 44. One of the characteristics of plant in the savanna is the A. possession of thin, smooth barks B. possession 33. The radicle of a bean seedling grows most rapidly in of large tap roots C. production of seedlings on the region mother plant D. possession of thick, flaky barks. A. of the root tip B. just above the root tip C. just around the root tip D. just below the root tip. 45. Which of the following disease can be contracted areas with fast flowing rivers? 34. The main function of the choroid is A. Schistosomiasis B. Elephantiasis C. Syphilis A. protection of the eye ball B. transmission of light D. Onchocerciasis. C. supply of nutrients to tissues of the eye D. converging light. 46. Which of the following causes pollution? A. Consumption of canned drinks. B. The addition of 35. What part of the central nervous system is fertilizer to farmland C. Respiration of living concerned with answering an examination question? organisms D. Burning of refuse. A. Cerebrum B. Cerebellum C. Medulla oblongata D. Spinal cord. 47. The mineral nutrient that is most bound to the soil is A. phosphorus B. calcium C. iron D. potassium. 36. If a dark-skinned woman (Bb) marries an albino man (bb) and they have four children, how many of the 48. The mineral nutrient that easily gets leached out of children will be dark-skinned? the soil is A. 3 B. 2 C.1 D.0. A. phosphorus B. calcium C. magnesium D. nitrate.  Uploaded on www.myschoolgist.com.ng 49. Most commercial fertilizers are rich in salts of 50. Dead plants and animals are decomposed by bacteria A. Sodium, iron and calcium B. nitrogen, phosphorus and and fungi into potassium C. iron, copper and nitrogen D. calcium, A. butterfly B. grasshopper C. mosquito D. housefly. sodium and phosphorus. Biology 1989 Use the figure below to answer questions 1 to 3 10. Which of the following is a common characteristic of crustaceans? A. Possession of a pair of antennae B. Possession of two pairs of antennae. C Each segment has a pair of walking legs D. Four pairs of walking legs on the cephalothorax. 11. The pedipalpi in spiders are used for A. grasping B. Walking C. feeling D. Web spinning. 12. The body of a snail is divided into head 1. The structure labelled 5 is the A. thorax and abdomen B. visceral mass and A. neucleolus B. Golgi body C. mitochondrion vacuole abdomen C. thorax and foot D. visceral mass and foot. 2. Which of the labelled parts of the cell contains ribonucleic acid? Use the diagram below to answer questions 13 to 14 A. 1 B. 2 C. 3 D. 5 3. Which structure is known as the power house of the cell? A. 6 B. 5 C. 4 D. 3 4. When a virus is placed in a non-living medium it A. becomes dehydrated B. forms spores C. forms flagella D. becomes crystallized. 5. A characteristic of the phylum coelenterate is that 13. Which of the labelled parts is used for feeling? A. most of them are marine B. they possess a gut A.1 B.2 C.3 D.4 with a single opening C. they possess numerous pores on their body D. they are 14. The structure labelled 2 is the bilaterally symmetrical. A. compound eye B. ocellus C. antenna D. labial palp. 6. A multinucleate body without internal cell 15. In a dicotyledonous stem, each companiosn cells boundaries is characteristic of is found beside the A. bryophytes B. fungi C. algae D. gymnosperms. A. endodermal cell B. xylem vessel C. sieve tube D. pericyclic fibre. 7. Double fertilization is a unique feature of A. angiosperms B. bryophytes C. pteridophytes Use the diagram below to answer questions 16 to 17 D. algae. 8. Which of the following phyla have members with both internal and external segmentation? A. Platyhelminthes B. Nematoda C. Algae D. Mollusca 16. Which of the structure’s is the molar? A.1 B.2 C. 3 D.4 9. Mineral salts can be absorbed into the roots by A. osmosis only B. osmosis and diffusion 17. What is the function of 3? C. diffusion and active transport D. imbibition only. A. Cutting off large pieces of food. B. Seizure and tearing of prey C. Grinding of food D. Tearing of flesh only  Uploaded on www.myschoolgist.com.ng 18. If a healthy potted plant is continuously kept in 29. The components of castor oil seed and the maize dim of light grain are similar EXCEPT for the A. the rate of respiration may equal that of A. number of cotyledons B. location of the embryo photosynthesis B. more carbon dioxide and C. number of radicles D. number of plumules. water are taken in C. respiration may be halted D. the volume of oxygen released increases. 30. A corm differs from a bulb in that A. its stem is the main food storage organ 19. The pancreatic juice contains the enzymes B. it has a flattened disc-shaped stem amylopsin, C. buds are absent in the axils of the leaves A. pepsin and trypsinogen B. rennin and D. adventitious roots are present steapsin C. steapsin and trysinogen D. steapsin and ptyalin. 31. Exponential increase in the population of an organism is a characteristic feature of 20. Aged erythrocytes are destroyed in the A. binary fission B. sexual reproduction A. pancreas B. liver C. lymph nodes D. kidney. C. budding D. vegetative propagation. 21. The seedlings in a rice field were found to have 32. The irreversible life process by which new thin lanky growth with reddish leaves and poor protoplasm is added to increase the size and weight root development. This is because the soil lacks of an organism can be termed A. sulphur B. phosphorus C. potassium D. iron. A. anabolism B. catabolism C. growth D. development. 22. There will be agglutination when the A. Group A serum mixes with Group A erythrocytes 33. Fruit enlargement can be induced by spraying B. Group A serum mixes with Group B erythrocytes young ovary with C. Group AB serum mixes with Group O erythrocytes A. cytokinin, abscisic acid and ethylene D. Group B serum mixes with Group B erythrocytes. B. gibberellin, ethylene and abscisic acid C. auxin, abscisic acid and ethylene Use the figure below to answer questions 24 to 26 D. auxin, cytokinin and gibberellin. 34. A fundamental similarity between nervous and hormonal system is that both A. involve chemical transmission B. have widespread effects C. shed chemicals into the blood stream D. evoke rapid responses. 35. The region that controls most of the unconscious processes of a mammalian body is the 23. Which of the following is the function of lymph? A. cerebellum B. cerebrum C. spinal cord A. Carries hormones round the body B. Transport D. medulla oblongata. nutrient and oxygen from blood, capillaries to the cells. C. Distributes heat uniformly round 36. During cell division, the two strands of chromosomes the body D. Conveys aminoacids and glucose are joined at a point called from the small intestine to the liver. A. spindle B. chromatid C. centromere D. aster. 24. The type of joint at the point labelled 5 is the 37. When the two alleles present in an organism are A. pivot joint B. gliding joint C. ball and socket of the same type, the genotype is described as D. hinge joint. A. heterozygous B. heterogamous C. homozygous D. homologous. 25. Which of the labelled bones is the ulna? A. 1 B. 3 C.4 D.5 38. If parents with blood groups AB and OO produce six children 26. What is the name of the structure labelled 2? A. three of them will have group B A. Odontoid process B. Olecranon B. Process B. two of them will have group A C. Patella D. Condyle. C. all the offspring will h ave group O D. none of them will have group A. 27. The lumbar vertebra when compared with a thoracic vertebra has a 39. Which of the following is a sex-linked character? A. longer neural spine B. wider neural canal A. Sickle-cell anaemia B. Tongue rolling C. Skin colour C. thicker centrum D. shorter transverse process. D. Colour blindness 28. Wind-pollinated flowers usually have A. rough pollen grains B. sticky stigmas C. small and short stigmas D. long styles.  Uploaded on www.myschoolgist.com.ng 40. In an ecosystem, the LEAST efficient energy 47. Most irrigated lands often become unproductive transfer link is from in later years because of A. producers to primary consumers B. sun to A. loss of fertility B. increase in salinity C. soil producers C. primary consumers to secondary erosion D. loss of water consumers D secondary consumers to decomposers. 48. Farmers practices crop rotation because it A. helps to prevent soil erosion B. allows two 41. Lichen is an example of crops to be planted at the same time A. a saprophytic organism B. a symbiotic C. helps to conserve soil fertility association C. an epiphytic plant D. is an alternative to shifting cultivation D. a carnivorous plants. 42. A physiological adaptation of plants to the problem of excessive water loss is A. reduction in the number of stomata B. reversal of the normal stomatal rhythm C. possession of shallow roots D. possession of waxy cuticle. 43. Which of the ways of controlling bilharzia can result in pollution? A Clearing water weeds on which the snails feed. B. Treating infected people with drugs C. Preventing contamination of water by infected urine and faeces D. Applying chemical to kill the snails. 44. Which of the following diseases can be caused 49. In which of the habitant will the plants show by a bacterium? xeromorphic features most prominently? A. ringworm B. poliomyelitis C. malaria D. syphilis. A.X B.R C.P D.Q 45. Which of the following is a dangerous product of 50. Which ecological factor exerts the greatest coal buming? influence on the structure of the profiles? A. sulphur dioxide B. carbondioxide C. carbon A. topographic B. edaphic C. biotic D. climatic. D. nitrogen. 46. 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? A. 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. Biology 1990 1. Viruses are considered to be living organisms 4. Which of the following groups of invertebrates because they reproduces by budding A. possess transmittable characters B. move from A. Arthropoda B. Annelida C. Mollusca one place to another C. respond to stimulation D. Coelenterata. D. ingest food materials 5. The algae, bryophytes and pteriodophytes are 2. Which of the following characteristics is common to similar in that they Amoeba and Paramecium? A. are sea weeds B. have no vascular tissues A. Oral groove B. Trichoyst C. Contractile vacuole C. require moisture for fertilization D. Cilia D. are microscopic plants. 3. Hydra removes undigested food by A. passing it through the anus B. passing it through 6. The spores of ferns are dispersed by the mouth C. means of a contractile vacuole A. wind B. water C. insects D. explosive D. egesting it through the body surface. mechanism.  Uploaded on www.myschoolgist.com.ng 7. In bryophytes, sex organs are produced in the 18. The first step in the process of photosynthesis is the A. gametophyte B. rhizoid C. protonema A. activation of the chlorophyll B. photolysis of water D. sporophyte C. reduction of carbondioxide D. formation of sugar. Use the figure below to answer questions 8 and 9 19. Which of the following food substances will produce a brick-red colour when warmed with Benedicts’s solution A. Glucose B. Starch C. Egg white D. Maltose. 20. The organ which secretes digestive enzymes as well as hormone is the A. liver B. salivary gland C. pancreas D. spleen. 21. The villus in the small intestine is significant because it A. increases the surface area for absorption B. increases the surface area for digestion C. assists in mixing digested food D. assists in filtering undigested food. 22. If a ring of bark and phloem is removed from a stem, the A. plant dies immediately B. plant dies after two days C. movement of food is not affected D. movement of 8. The part labelled 3 is the mineral salts is hardly affected. A. leaf scar B. lenticel C. auxiliary bud D. girdle scar 23. Transpiration can be measured with a 9. Which part of the twig produces auxins? A. photometer B. hygrometer C. potometer A.4 B.3 C.2 D.1 D. barometer. 10. Which of the following animals has homodont dentition? 24. Excretory products responsible for the red, purple and A. Rat B. Man C. Lizard D. Pigeon. blue colours of flowers are called A. alkaloids B. tannims C. anthocyanins D. resins. 11. In which of the following does external fertilization take place? 25. Etiolation is caused by the influence of A. Toad B. Lizard C. Bird D. Cockroach. A. mineral salts B. water C. carbondioxide D. light. 12. In the tapeworm, the suckers on the scolex are 26. Muscles are indirectly attached to bones by means of used for A. ligaments B. membranes C. tendons D. sultures. A. sucking the blood of the host B. holding fast to the host C. reproduction D. locomotion Use the figure below to answer questions 27 and 28. 13. A feature which adapts birds to flight is the possession of A. scally legs B. light bones C. two walking legs D. a pointed beak. 14. The nephridia in the earthworm form part of the A. reproductive system B. respiratory system. C circulatory system D. excretory system. 15. Which of the following diseases is rarely spread by a housefly? 27. Which structure is the glomerulus? A. Yellow fever B. Dysentery C. Typhoid fever A. 5 B.3 C. 2 D.1. D. Poliomyelitis 28. If the blood is too concentrated, more water is absorbed from 16. Which of the following cells is thin-walled and A. 5 B.4 C.3 D.1 living at maturity? A. Collenchyma B. Sieve tube C. Xylem vessel 29. During mammalian embryo development, large amount D. Sclerenchyma. of oestrogen and progesterone are produced in the A. umbilical cord B. amnion C. placenta D. amniotic fluid. 17. The mode of nutrition in which digestion is extracelluar is A. holophytic B. parasitic C. holozoic D. saprophytic.  Uploaded on www