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JAMB 2012

2012 JAMB Biology Past Questions

The 2012 JAMB Biology past questions with answers: 49 objective questions from the 2012 paper in the DeeepSolve question bank, each with its answer behind "Show answer". Try each question before you check, then practise the paper as a timed JAMB-style CBT.

Past questions © the examination body (JAMB/WAEC/NECO). DeeepSolve is not affiliated with them. Rights holders: see /copyright.

Questions

  1. 1.

    The diseases caused by water-borne pathogens include

    1. A.gonorrhoea and poliomyelitis
    2. B.typhoid and syphilis
    3. C.tuberculosis and cholera
    4. D.typhoid and cholera
    Show answer

    Answer: D. typhoid and cholera

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  2. 2.

    The presence of stilt roots, pneumatophores, sunken stomata and salt glands are adaptive features of plants found in the

    1. A.tropical rainforest
    2. B.mangrove swamps
    3. C.gressland
    4. D.montane forest
    Show answer

    Answer: B. mangrove swamps

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  3. 3.

    In the kidney of mammals, the site of ultrafiltration is the

    1. A.uriniferous tubule
    2. B.Bowman's capsule
    3. C.loop of Henle
    4. D.renal tubule
    Show answer

    Answer: B. Bowman's capsule

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  4. 4.

    From his study of Galapagos finches, Darwin derived his theory of evolution from

    1. A.comparative anatomy
    2. B.comparative physiology
    3. C.fossil remains
    4. D.comparative embryology
    Show answer

    Answer: A. comparative anatomy

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  5. 5.

    An animal body that can be cut along its axis in any plane to give two identical parts is said to be

    1. A.radially symmetrical
    2. B.bilaterally symmetrical
    3. C.asymmetrical
    4. D.symmetrical
    Show answer

    Answer: A. radially symmetrical

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  6. 6.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  7. 7.

    The correct base pairing for DNA is

    1. A.adenine → thymine and guanine → cytosine
    2. B.adenine → guanine and thymine → cytosine
    3. C.adenine → cytosine and guanine → thymine
    4. D.adenine → adenine and cytosine → cytosine
    Show answer

    Answer: A. adenine → thymine and guanine → cytosine

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  8. 8.

    Plants that show secondary growth are usually found among the

    1. A.thallophytes
    2. B.pteridophytes
    3. C.monocotyledons
    4. D.dicotyledons
    Show answer

    Answer: D. dicotyledons

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  9. 9.

    Which of the following animals can exist solely on the water they get from food and metabolic reactions?

    1. A.forest arboreal dweller
    2. B.Desert dwellers
    3. C.forest-ground dweller
    4. D.rainforest dwellers
    Show answer

    Answer: B. Desert dwellers

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  10. 10.

    An indigenous method of renewing and maintaining soil fertility is by

    1. A.clearing farms by burning
    2. B.planting one crop type
    3. C.adding inorganic fertilizers yearly
    4. D.crop rotation and shifting cultivation
    Show answer

    Answer: D. crop rotation and shifting cultivation

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  11. 11.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  12. 12.

    Which of the following possesses mammary gland?

    1. A.Dogfish
    2. B.whale
    3. C.shark
    4. D.catfish
    Show answer

    Answer: B. whale

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  13. 13.

    Organisms living in an estuarine habitat are adapted to

    1. A.withstand wide fluctuations in temperature
    2. B.survive only in water with low salinity
    3. C.withstand wide fluctuations in salinity
    4. D.feed only on phytoplankton and dead organic matter
    Show answer

    Answer: C. withstand wide fluctuations in salinity

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  14. 14.

    Which of the following plant structures lacks a waterproof cuticle?

    1. A.leaf
    2. B.stem
    3. C.root
    4. D.shoot
    Show answer

    Answer: C. root

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  15. 15.

    The abiotic factors that control human population include

    1. A.disease and famine
    2. B.space and rainfall
    3. C.flooding and earthquake
    4. D.temperature and disease
    Show answer

    Answer: C. flooding and earthquake

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  16. 16.

    A function of the hydrochloric acid produced in the human stomach during digestion is to

    1. A.neutralise the effect of bile
    2. B.coagulate milk protein and emulsify fats
    3. C.stop the action of ptyalin
    4. D.break up food into smaller particles
    Show answer

    Answer: C. stop the action of ptyalin

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  17. 17.

    An arthropod that is destructive at early stage of its life cycle is

    1. A.butterfly
    2. B.mosquito
    3. C.bee
    4. D.millepede
    Show answer

    Answer: A. butterfly

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  18. 18.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  19. 19.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  20. 20.

    The most likely first colonizers of a bare rock are

    1. A.mosses
    2. B.ferns
    3. C.lichen
    4. D.fungi
    Show answer

    Answer: C. lichen

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  21. 21.

    The carrying capacity of a habitat is reached when the population growth begins to

    1. A.increase slowly
    2. B.increase exponentially
    3. C.slow down
    4. D.remain steady
    Show answer

    Answer: D. remain steady

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  22. 22.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  23. 23.

    The autonomic nervous system consists of neurons that control the

    1. A.voluntary muscles
    2. B.heart beat
    3. C.tongue
    4. D.hands
    Show answer

    Answer: B. heart beat

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  24. 24.

    Plants of temperate origin can be grown in tropical areas in the vegetation zones of the

    1. A.rain forest
    2. B.guinea savanna
    3. C.sudan savanna
    4. D.montane forest
    Show answer

    Answer: D. montane forest

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  25. 25.

    The type of interaction shown is referred to as

    1. A.interspecific competition
    2. B.intraspecific competition
    3. C.mutualism
    4. D.cooperation
    Show answer

    Answer: C. mutualism

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  26. 26.

    When a colour-blind man marries a carrier woman. What is the probability of their offspring being colour blind?

    1. A.25%
    2. B.50%
    3. C.75%
    4. D.100%
    Show answer

    Answer: B. 50%

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  27. 27.

    Which of the following is a polysaccharide?

    1. A.Glucose
    2. B.Sucrose
    3. C.Maltose
    4. D.Cellulose
    Show answer

    Answer: D. Cellulose

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  28. 28.

    The basking of Agama lizards in the sun is to

    1. A.change the colour of their body
    2. B.raise their body temperature to become active
    3. C.fight to defend their territories
    4. D.attract the female for courtship
    Show answer

    Answer: B. raise their body temperature to become active

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  29. 29.

    Which of the following is the lowest category of classification?

    1. A.class
    2. B.species
    3. C.family
    4. D.genus
    Show answer

    Answer: B. species

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  30. 30.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  31. 31.

    Which of the following is involved in secondary thickening in plants?

    1. A.Collenchyma and xylem cells
    2. B.Vascular cambium
    3. C.Cork cambium and sclerenchyma
    4. D.Vascular cambium and cork cambium
    Show answer

    Answer: D. Vascular cambium and cork cambium

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  32. 32.

    The water cycle is maintained mainly by

    1. A.evaporation of water in the environment
    2. B.evaporation and condensation of water in the environment
    3. C.condensation of water in the environment
    4. D.transpiration and respiration in plants
    Show answer

    Answer: B. evaporation and condensation of water in the environment

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  33. 33.

    In plants which of the following is required in minute quantities for growth?

    1. A.Copper
    2. B.Potassium
    3. C.Phosphorus
    4. D.Sodium
    Show answer

    Answer: A. Copper

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  34. 34.

    Which of the following organisms is both parasitic and autotrophic?

    1. A.Sundew
    2. B.Loranthus
    3. C.Rhizopus
    4. D.Tapeworm
    Show answer

    Answer: B. Loranthus

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  35. 35.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  36. 36.

    The largest number of cassava plants has an approximate height of

    1. A.1.4m
    2. B.1.6m
    3. C.1.8m
    4. D.2.0m
    Show answer

    Answer: D. 2.0m

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  37. 37.

    The short thick beak in birds is an adaptation for

    1. A.crushing seeds
    2. B.sucking nectar
    3. C.tearing flash
    4. D.straining mud
    Show answer

    Answer: A. crushing seeds

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  38. 38.

    In the mammalian male reproductive system, the part that serves as a passage for both urine and semen is the

    1. A.urethra
    2. B.urter
    3. C.bladder
    4. D.seminal vesicle
    Show answer

    Answer: A. urethra

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  39. 39.

    Which of the following is true in blood transfusion?

    1. A.person of blood group AB can donate blood only to another person of blood group AB
    2. B.persons of blood groups A and B can donate or receive blood from each other
    3. C.A person of blood group AB acn receive blood only from persons of blood group A or B
    4. D.A person of blood group O can donate only to a person of blood group O
    Show answer

    Answer: A. person of blood group AB can donate blood only to another person of blood group AB

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  40. 40.

    The fungi are distinct group of eukaryote mainly because they have

    1. A.spores
    2. B.no chlorophyll
    3. C.many fruiting bodies
    4. D.asexual and sexual reproduction
    Show answer

    Answer: B. no chlorophyll

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  41. 41.

    An example of a fruit that develops from a single carpel is

    1. A.okro
    2. B.tomato
    3. C.bean
    4. D.orange
    Show answer

    Answer: C. bean

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  42. 42.This question needs a diagram, table or passage that we don't have yet, so it isn't shown.

  43. 43.

    The significance of a very large number of termites involved in nuptial swarming is to

    1. A.provide birds with plenty of food
    2. B.ensure their perpetuation despite predatory pressure
    3. C.search for a favourable place to breed
    4. D.ensure that every individual gets a mate
    Show answer

    Answer: B. ensure their perpetuation despite predatory pressure

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  44. 44.

    The use and disuse of body parts and the inheritance of acquired traits were used to explain

    1. A.Darwin's theory
    2. B.Lamarck's theory
    3. C.genetic drift
    4. D.gene flow
    Show answer

    Answer: B. Lamarck's theory

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  45. 45.

    Which of the following is most advanced in the evolutionary trend of animals?

    1. A.Liverfluke
    2. B.Earthworm
    3. C.Snail
    4. D.Cockroach
    Show answer

    Answer: D. Cockroach

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  46. 46.

    Plant growth can be artificially stimulated by the addition of

    1. A.gibberellin
    2. B.kinin
    3. C.abscisic acid
    4. D.ethylene
    Show answer

    Answer: A. gibberellin

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  47. 47.

    Countershading is an adaptive feature that enables animals to

    1. A.fight enemies
    2. B.remain undetected
    3. C.warn enemies
    4. D.attract mates
    Show answer

    Answer: B. remain undetected

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  48. 48.

    The feature that links birds to reptiles in evolution is the possession of

    1. A.feathers
    2. B.beak
    3. C.skeleton
    4. D.scales
    Show answer

    Answer: D. scales

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  49. 49.

    A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are croos-bred, yellow seeds and white seeds are obtained in a ratio 3:1 . The yellow seed is said to be

    1. A.non-heritable
    2. B.sex-linked
    3. C.a recessive trait
    4. D.a dominant trait
    Show answer

    Answer: D. a dominant trait

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