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WAEC (WASSCE) 2019

2019 WAEC (WASSCE) Biology Past Questions

The 2019 WAEC (WASSCE) Biology past questions with answers: 50 objective questions from the 2019 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.

    Muscle fatigue in the body of an athlete is due to__________

    1. A.low pH
    2. B.high oxygen content
    3. C.accumulation of lactic acid
    4. D.accumulation of carbonic acid
    Show answer

    Answer: C. accumulation of lactic acid

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  2. 2.

    A man whose blood group is heterozygous B is married to a woman whose blood up is also heterozygous B Which of the following statements is correct about the blood group of their four offspring?

    1. A.Three of them belong to blood group B
    2. B.Three of them belong to blood group O
    3. C.None of them belongs to blood group O
    4. D.Two of them belong to blood group B
    Show answer

    Answer: A. Three of them belong to blood group B

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  3. 3.

    The cross between RrTt and rrtt where R is a gene for red colour and T for tallness will result in______

    1. A.all the offspring being tall with red fruits
    2. B.25 % tall with red fruits
    3. C.50 % tall with red fruits
    4. D.75 % tall with red fruits
    Show answer

    Answer: B. 25 % tall with red fruits

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  4. 4.

    Which of the following nucleotides is not found in the DNA molecules?

    1. A.Adenine
    2. B.Cytosine
    3. C.Guanine
    4. D.Uracil
    Show answer

    Answer: D. Uracil

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  5. 5.

    Which of the following statements is not true about hormones?

    1. A.Their responses are voluntary
    2. B.They may affect more than one target organ
    3. C.They are chemical messengers in animals
    4. D.They are transported by the blood to the target organs
    Show answer

    Answer: A. Their responses are voluntary

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  6. 6.

    Tooth decay is usually caused by___________

    1. A.undigested and absorbed food
    2. B.eating a limited amount of sweetened food.
    3. C.the bacteria ín the mouth that metabolize sugar to acids
    4. D.eating a lot of proteinous foods
    Show answer

    Answer: C. the bacteria ín the mouth that metabolize sugar to acids

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  7. 7.

    Which of the following structures will NOT be found in the nucleus of a cell?

    1. A.DNA
    2. B.Nucleolus
    3. C.Lysosome
    4. D.Centriole
    Show answer

    Answer: A. DNA

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  8. 8.

    Light is excluded from a water culture experiment in order to________

    1. A.prevent overheating of the roots
    2. B.enable the roots to grow straight down
    3. C.prevent ionization of water molecules
    4. D.prevent the growth of algae
    Show answer

    Answer: D. prevent the growth of algae

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  9. 9.

    If 90 ants are found in a field with a total area of 100 m. what is the population density of the ants?

    1. A.0.09
    2. B.0.90
    3. C.9.00
    4. D.90.00
    Show answer

    Answer: B. 0.90

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  10. 10.

    Cholera is mostly spread by_______

    1. A.air
    2. B.soil
    3. C.water
    4. D.noise
    Show answer

    Answer: C. water

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  11. 11.

    The function of the part labelled II is that it controls_______

    1. A.posture and balance of the body
    2. B.all voluntary actions
    3. C.temperature and appetite
    4. D.many involuntary actions
    Show answer

    Answer: C. temperature and appetite

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  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 forms of energy is utilized during photosynthesis?

    1. A.Potential
    2. B.Kinetic
    3. C.Solar
    4. D.Chemical
    Show answer

    Answer: C. Solar

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  14. 14.

    The products of tissue respiration are_________

    1. A.glucose, oxygen, and water
    2. B.oxygen, water, and energy
    3. C.glucose, carbon dioxide, and energy
    4. D.water, carbon dioxide, and energy
    Show answer

    Answer: D. water, carbon dioxide, and energy

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  15. 15.

    Organisms in an ecosystem are usually grouped according to their trophic level into__________

    1. A.carnivores and omnívores,
    2. B.consumers and parasites
    3. C.producers, and saprophytes
    4. D.Producers and consumers
    Show answer

    Answer: D. Producers and consumers

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  16. 16.

    Which of the following soil fertility improvement methods will have the most negative effect on the ecosystem if not controlled?

    1. A.Application of N-P-K fertilizer
    2. B.Shifting cultivation
    3. C.Mixed farming
    4. D.Crop rotation
    Show answer

    Answer: A. Application of N-P-K fertilizer

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  17. 17.

    The classes of plants the root systems in diagrams I and II above represent respectively are______________

    1. A.Dicotyledoneae and Monocotyledoneae
    2. B.Monocotyledoneae and Dicotyledoneae
    3. C.Dicotyledoneae and Dicotyledoncae
    4. D.Monocotyledoneae and Monocotyledoneae
    Show answer

    Answer: D. Monocotyledoneae and Monocotyledoneae

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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.

    Which of the following resources is renewable?

    1. A.Petroleum
    2. B.Coal
    3. C.Iron
    4. D.Trees
    Show answer

    Answer: D. Trees

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  20. 20.

    The heart can beat continuously without being fatigued because it is composed of________

    1. A.skeletal muscles
    2. B.smooth muscles
    3. C.cardiac muscles
    4. D.renal muscles
    Show answer

    Answer: C. cardiac muscles

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

  22. 22.

    The salinity of a brackish habitat________

    1. A.increases immediately after rainfall
    2. B.increases at the end of the rain
    3. C.decreases with an increase in the number of organisms
    4. D.increases during the dry season
    Show answer

    Answer: D. increases during the dry season

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  23. 23.

    Deficiency in insulin could lead to________

    1. A.cirrhosis
    2. B.hepatitis
    3. C.diabetes
    4. D.nephritis
    Show answer

    Answer: C. diabetes

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  24. 24.

    The yellow and black stripes on the body of wasps is an example of________

    1. A.mimicry
    2. B.courtship behaviour
    3. C.camouflage
    4. D.warning colouration
    Show answer

    Answer: D. warning colouration

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  25. 25.

    In a complete dominance monohybrid cross between a pure breeding yellow-flowered plant Y and a pure breeding white-flowered plant y, the result of the first filial generation is _________

    1. A.50 % yellow flowers
    2. B.75% yellow flowers
    3. C.all yellow flowers
    4. D.all white flowers
    Show answer

    Answer: C. all yellow flowers

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

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

  28. 28.

    The process is called_______

    1. A.replication
    2. B.cell maturation
    3. C.crossing over
    4. D.mutation
    Show answer

    Answer: C. crossing over

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  29. 29.

    Which of the following roles is not performed by a government agency responsible for forest maintenance?

    1. A.Regulating the harvest of timber and poaching
    2. B.Creating, protecting and managing the forest reserves
    3. C.Tracking the movement of timber, wood, and wildlife
    4. D.Regulating mining activities in the forest
    Show answer

    Answer: D. Regulating mining activities in the forest

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  30. 30.

    The major mineral present in the shell of Molluscs is________

    1. A.Copper
    2. B.Sodium
    3. C.Iron
    4. D.Calcium
    Show answer

    Answer: D. Calcium

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  31. 31.

    The essential parts of the flower are labelled_______

    1. A.I, II and III
    2. B.II, III and IV
    3. C.III, V and VI
    4. D.IV, V and VI
    Show answer

    Answer: C. III, V and VI

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  32. 32.

    Underground storage stems which grow horizontally in the soil are_______

    1. A.bulbs
    2. B.runners
    3. C.rhizomes
    4. D.corms
    Show answer

    Answer: C. rhizomes

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  33. 33.

    The conversion of ammonium salts into nitrates is called_______

    1. A.putrefaction
    2. B.denitrification
    3. C.fixation
    4. D.nitrification
    Show answer

    Answer: D. nitrification

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  34. 34.

    Excretory products in plants responsible for the discoloration of flowers are called__________

    1. A.alkaloids
    2. B.tannins
    3. C.anthocyanins
    4. D.resins
    Show answer

    Answer: C. anthocyanins

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  35. 35.

    The digestion of proteins starts in the______

    1. A.small intestine
    2. B.stomach
    3. C.large intestine
    4. D.mouth
    Show answer

    Answer: B. stomach

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  36. 36.

    Tall trees with unbranched trunks which grow above the upper storey of the forest are commonly referred to as _____

    1. A.Emergents
    2. B.Herbs
    3. C.Lianes
    4. D.Shrubs
    Show answer

    Answer: A. Emergents

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  37. 37.

    To focus on a distant object, the ciliary muscle of the eye______

    1. A.contracts and the eye lens gets thicker
    2. B.relaxes and the eye lens gets thinner
    3. C.contracts and the eye lens gets thinner
    4. D.relaxes and the eye lens gets thicker
    Show answer

    Answer: B. relaxes and the eye lens gets thinner

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  38. 38.

    The biological importance of the dance by the worker honeybee is that it___________

    1. A.acts as a signal for mating
    2. B.serves as a warning signal
    3. C.signals the availability of food
    4. D.serves as a means of identifying members of the caste
    Show answer

    Answer: C. signals the availability of food

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  39. 39.

    Maize grains are best stored against insect attacks by__________________

    1. A.keeping in a silo
    2. B.storing in the room
    3. C.leaving them on their cobs
    4. D.covering with leaves
    Show answer

    Answer: A. keeping in a silo

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  40. 40.

    An example of organ level of organization is _______

    1. A.bird
    2. B.kidney
    3. C.spermatozoon
    4. D.xylem
    Show answer

    Answer: B. kidney

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  41. 41.

    In the pyramid of energy illustrated above, the organism with the least amount of transferred energy is___________

    1. A.Spirogyra
    2. B.Tadpole
    3. C.Fish
    4. D.Bird
    Show answer

    Answer: D. Bird

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  42. 42.

    The specific role of a species within íts environment is known as its_________

    1. A.habitat
    2. B.niche
    3. C.trophic level
    4. D.biotic community
    Show answer

    Answer: B. niche

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  43. 43.

    Which of the following factors is not a source of variation in living organisms?

    1. A.Environment
    2. B.Inheritance
    3. C.Mitosis
    4. D.Meiosis
    Show answer

    Answer: C. Mitosis

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  44. 44.

    The process of maintaining a steady internal environment is known as__________

    1. A.osmoregulation
    2. B.equilibration
    3. C.homeostasis
    4. D.plasmolysis
    Show answer

    Answer: C. homeostasis

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  45. 45.

    The main function of the amniotic fluid is for______________

    1. A.respiration in the foetus
    2. B.protection of the foetus from shock
    3. C.Lubricating the birth canal foetus
    4. D.nourishing the foetus
    Show answer

    Answer: B. protection of the foetus from shock

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  46. 46.

    The part labelled I is the________

    1. A.centromere
    2. B.spindle fibre
    3. C.centriole
    4. D.chiasmata
    Show answer

    Answer: B. spindle fibre

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  47. 47.

    A structural similarity between Parameciumn and Amoeba is the presence of______

    1. A.one food vacuole
    2. B.two contractile vacuoles
    3. C.two nuclei
    4. D.one gullet
    Show answer

    Answer: C. two nuclei

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  48. 48.

    Individuals with blood group AB can donate blood to individuals with blood group(s)___________?

    1. A.A and B
    2. B.A and O
    3. C.AB only
    4. D.O only
    Show answer

    Answer: C. AB only

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  49. 49.

    The complex relationship between the members of a community and their physical environment is known as________

    1. A.commensalism
    2. B.symbiosis
    3. C.saprophytism
    4. D.ecology
    Show answer

    Answer: D. ecology

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  50. 50.

    The rate of diffusion of molecules between two media will be higher if_________?

    1. A.the difference in concentration of the two media is low
    2. B.the difference in concentration of the two media is negligible
    3. C.the difference in concentration of the two media is high
    4. D.there is no difference in the concentration of the two media
    Show answer

    Answer: C. the difference in concentration of the two media is high

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