Biology 2020 Past Questions | JAMB

Study the following Biology past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.


Use the diagram to answer the questions 16 to 17.

The vertebra illustrated is

  • A. lumber
  • B. thoracic
  • C. caudal
  • D. cervical

 17.  Use the diagram to answer the questions 16 to 17

The neural arch is labelled

  • A. i
  • B. ii
  • C. iii
  • D. iv

18. The excretory structure in the earthworm is the

  • A. malphighian tubule
  • B. flame cell
  • C. nephridium
  • D. kidney

19. In which of the following vertebrates does the skin function as a respiratory surface

  • A. rat
  • B. lizard
  • C. fish
  • D. frog

20.  The process of walking is under the control of the part of the brain called

  • A. optic lobe
  • B. olfactory lobe
  • C. cerebellum
  • D. medulla oblongata

21. The function of ribosome in cells is

  • A. protein synthesis
  • B. starch synthesis
  • C. transport of material
  • D. lipid storage

22. A group of organism of different species living in a particular area is described as a

  • A. colony
  • B. community
  • C. population
  • D. niche

23. The biological association that contributes directly to succession in a community is

  • A. competition
  • B. predation
  • C. parasitism
  • D. commensalism

24. Floating microscopic heterotrophs are mostly grouped as

  • A. phytoplankton
  • B. zooplankton
  • C. microbes
  • D. nekton

25. Vaccination is carried out in order to

  • A. check the production of poison
  • B. increase the activities of white blood cells
  • C. increase the number of red blood cells
  • D. stimulate the production of anti-bodies

26.  For growth to occur in organisms, the rate of

  • A. anabolism must exceed that of catabolism
  • B. catabolism must exceed that of anabolism
  • C. food storage must be low
  • D. food storage must be high

27. The probability of a baby being a boy or a girl depends on the contribution of the

  • A. father’s sex cells
  • B. father’s stomatic chromosome
  • C. mother’s sex cell
  • D. mother’s X-chromosome

28. Both recessive and dominant characters are found

  • A. on different chromosome in the cell
  • B. at the same logus of a homologous chromosome
  • C. at a different loci of a homologous chromosome
  • D. on the same chromatid in a chromosome


  1. In a population of living things, the parameters of size, height, weight and colours are examples of
  • A. continuous variation
  • B. non-heritable variation
  • C. discontinuous variation
  • D. physiological variation

30. The process of water loss and intake indicated by the arrows labelled i and ii are respectively

  • A. evaporation and osmosis
  • B. osmosis and exhalation
  • C. osmosis and diffusion
  • D. urination and diffusion
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