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WAEC (WASSCE) 2015

2015 WAEC (WASSCE) Biology Past Questions

The 2015 WAEC (WASSCE) Biology past questions with answers: 45 objective questions from the 2015 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 WAEC-style CBT.

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

Questions

  1. 1.

    A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses

    1. A.auxin
    2. B.gibberellins
    3. C.abscisin
    4. D.cytokinins
    Show answer

    Answer: C. abscisin

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  2. 2.

    Which of the following resources is non-renewable?

    1. A.Forest reserve
    2. B.Mineral deposit
    3. C.Water
    4. D.Wild life
    Show answer

    Answer: B. Mineral deposit

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  3. 3.

    Which of the following organs of the alimentary canal is not correctly matched with its function?

    1. A.Gall bladder- stores bile
    2. B.Liver - stores glycogen
    3. C.Appendix - releases enzymes
    4. D.Teeth = grind food
    Show answer

    Answer: C. Appendix - releases enzymes

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  4. 4.

    Which of the following statements about sex-linked characters is not true?

    1. A.They are usually borne on the X = chromosome
    2. B.They are more common in males
    3. C.Males are usually carriers
    4. D.They are not usually carried on the Y chromosomes
    Show answer

    Answer: C. Males are usually carriers

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  5. 5.

    Which of the following natural resources is most readily available to all organisms?

    1. A.Oil
    2. B.Water
    3. C.Air
    4. D.Food
    Show answer

    Answer: C. Air

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  6. 6.

    A community reaches a climax when

    1. A.only pioneer organisms are present
    2. B.new habitats are constantly being formed
    3. C.there is an introduction of new plants and animal species within the community
    4. D.the composition and size of a community remains constant over a long period
    Show answer

    Answer: D. the composition and size of a community remains constant over a long period

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

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

  9. 9.

    Which of the following organisms is an endo-parasite?

    1. A.Tapeworm
    2. B.Flea
    3. C.Tick
    4. D.Aphid
    Show answer

    Answer: A. Tapeworm

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  10. 10.

    A student used the following step in testing for a non-reducing sugar. I. added Benedict's solution to the sugar solution II. added dilute hydrochloric acid to the sugar solution and boiled it III. added sodium hydroxide solution to the solution in II and boiled; IV. added Benedict's solution to the cooled solution in III. The colour change to be observed in step IV is

    1. A.blue-black
    2. B.brick-red
    3. C.purple
    4. D.violet
    Show answer

    Answer: B. brick-red

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

  13. 13.

    Which of the following processes removes carbon (IV) oxide from the atmosphere?

    1. A.Burning fuels
    2. B.Putrefaction
    3. C.Photosynthesis
    4. D.Respiration in plants
    Show answer

    Answer: C. Photosynthesis

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  14. 14.

    Which of the following features could be used to determine the growth of a seedling?

    1. A.Number of flowers
    2. B.Number of leaves
    3. C.Length of flowers
    4. D.Length of radicle
    Show answer

    Answer: D. Length of radicle

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  15. 15.

    A person suffering from obstruction of the bile duct is advised not to eat fats and oil because

    1. A.bile digests fats and oil
    2. B.fats and oil can only be absorbed whenbile is absent
    3. C.bile emulsifies fat and oil
    4. D.bile adds water to digesting food
    Show answer

    Answer: C. bile emulsifies fat and oil

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  16. 16.

    Soil erosion could be prevented by

    1. A.flooding a farmland
    2. B.cover-cropping
    3. C.deforestation
    4. D.leaving the soil bare
    Show answer

    Answer: B. cover-cropping

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  17. 17.

    A student used the following steps in testing for a non-reducing sugar. I. added Benedict's solution to the sugar solution ll. added dilute hydrochloric acid to the sugar and boiled it; lll. added sodium hydroxide solution to the solution in ll. and boiled; IV. added Benedict's solution to the cooled solution in lll. Use this information above to answer the question. Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To

    1. A.oxidize the sugar solution
    2. B.hydrolyse the sugar solution
    3. C.dry the sugar solution
    4. D.increase the volume of the sugar solution
    Show answer

    Answer: B. hydrolyse the sugar solution

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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.

    Blood pressure is higher in the arteries as a result of

    1. A.stress
    2. B.contraction and relaxation
    3. C.blockage in the arteries
    4. D.presence of valves
    Show answer

    Answer: B. contraction and relaxation

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  20. 20.

    A woman with blood group A gives birth to a child with blood group O. Which of the following blood groups cannot belong to the father?

    1. A.A
    2. B.B
    3. C.C
    4. D.AB
    5. E.O
    Show answer

    Answer: D. AB

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  21. 21.

    Which of the following components make up an ecosystem?

    1. A.Decomposers, animals and non-living factors
    2. B.Living and non-living factors
    3. C.Plants and non-living factors
    4. D.Plants decomposers and non-living factors
    Show answer

    Answer: B. Living and non-living factors

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  22. 22.

    A student used the following steps in testing for a non-reducing sugar. I. added Benedict's solution to the sugar solution ll. added dilute hydrochloric acid to the sugar and boiled it; lll. added sodium hydroxide solution to the solution in ll. and boiled; IV. added Benedict's solution to the cooled solution in lll. Use this information above to answer the question. What is the importance of step ll in the testing process? To

    1. A.neutralize the sugar solution
    2. B.soften the sugar solution
    3. C.change the colour of the sugar solution
    4. D.increase the acid content of the sugar solution
    Show answer

    Answer: A. neutralize the sugar solution

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

  24. 24.

    Which of the following cells is a specialized cell?

    1. A.Amoeba
    2. B.Plasmodium
    3. C.Guard cell
    4. D.Meristematic cell
    Show answer

    Answer: C. Guard cell

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  25. 25.

    Which of the following statements about human blood groups is not true?

    1. A.A is dominant over B
    2. B.O is recessive
    3. C.B is dominant over O
    4. D.A and B are co-dominant
    Show answer

    Answer: A. A is dominant over B

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  26. 26.

    The main difference between a seed and a fruit is that a fruit

    1. A.is large while a seed is small
    2. B.has two scars while a seed is has one
    3. C.is pigmented while a seed is not
    4. D.can be dispersed by animals while a seed cannot
    Show answer

    Answer: B. has two scars while a seed is has one

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  27. 27.

    Which of the following organisms is not a protozoan?

    1. A.Amoeba
    2. B.Ascaris
    3. C.Plasmodium
    4. D.Paramecium
    Show answer

    Answer: B. Ascaris

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

  29. 29.

    The following organisms have structures for movement except

    1. A.Amoeba
    2. B.Spirogyra
    3. C.Volvox
    4. D.Paramecium
    Show answer

    Answer: B. Spirogyra

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  30. 30.

    Which of the following statements about protoplasm of a cell is not correct? It

    1. A.comprises of the nucleus
    2. B.consists of the cytoplasm
    3. C.comprises of the cell organelles
    4. D.consists the nucleus only
    Show answer

    Answer: D. consists the nucleus only

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  31. 31.

    A plant that commonly undergoes vegetative propagation by means of leaves is

    1. A.Hibiscus
    2. B.Bryophylum
    3. C.Crotalaria
    4. D.Spirogyra
    Show answer

    Answer: B. Bryophylum

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  32. 32.

    Which of the following characteristic features is not associated with monocotyledonous plants?

    1. A.Well differentiated sepals and petals
    2. B.Presence of fibrous root system
    3. C.Presence of narrow leaves
    4. D.Flora parts are in multiples of three
    Show answer

    Answer: A. Well differentiated sepals and petals

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

  34. 34.

    Oil applied to the surface of water kills the larvae of mosquitoes through

    1. A.dehydration
    2. B.poisoning
    3. C.starvation
    4. D.Suffocation
    Show answer

    Answer: D. Suffocation

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  35. 35.

    How many chromosomes will be in a gamete if the normal cell has four chromosomes?

    1. A.2
    2. B.4
    3. C.6
    4. D.8
    Show answer

    Answer: A. 2

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  36. 36.

    Water and salts are both lost from the human body in

    1. A.breath and sweat
    2. B.breath and Urine
    3. C.breath, urine and sweat
    4. D.sweat and urine
    Show answer

    Answer: D. sweat and urine

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

  38. 38.

    When a Spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become

    1. A.plasmolysed
    2. B.turgid
    3. C.shortened
    4. D.elongated
    Show answer

    Answer: A. plasmolysed

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  39. 39.

    The variety P,Q,R and S Outlive the others because the

    1. A.variety is the most beautiful
    2. B.variety does not have markings
    3. C.markings of the variety are similar to those of the environment
    4. D.predator does not like eating the variety
    Show answer

    Answer: B. variety does not have markings

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  40. 40.

    Study the diagram above and answer the question The structure labelled I is

    Diagram for question 40
    1. A.a pitcher
    2. B.an onion
    3. C.a flower
    4. D.a tendril
    Show answer

    Answer: D. a tendril

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  41. 41.

    A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have a affected the

    1. A.nose by extension
    2. B.olfactory lobes of the brain
    3. C.passage from the nose to the brain
    4. D.part of the skull near the nose
    Show answer

    Answer: B. olfactory lobes of the brain

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  42. 42.

    Ability of the human eye to focus images accurately on the retina is called

    1. A.astigmatism
    2. B.myopia
    3. C.adjustment
    4. D.accommodation
    Show answer

    Answer: D. accommodation

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  43. 43.

    The structure of the cell membrane is a

    1. A.double layer and a double protein layer
    2. B.middle bi-layer of protein with a lipid layer on either surface
    3. C.middle bi-layer of lipid with a protein layer on either surface
    4. D.protein layer with two inner lipid layers
    Show answer

    Answer: C. middle bi-layer of lipid with a protein layer on either surface

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  44. 44.

    Which of the following traits is not inheritable? Ability to

    1. A.taste PTC
    2. B.roll the tongue
    3. C.move the ear
    4. D.rool the eyeball
    Show answer

    Answer: D. rool the eyeball

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  45. 45.

    According to Mendel's first law of inheritance, segregation of genes occur when

    1. A.tall plants are crossbred
    2. B.short plants are crossbred
    3. C.tall plants and short plants are crossbred
    4. D.plants are crossbred
    Show answer

    Answer: C. tall plants and short plants are crossbred

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