Biology 2019 Past Questions | WAEC

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

16. 3

The diagram above is an illustration of a human brain. Study it and answer this question

The part labelled I is the_________

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

17. The function of the part labelled II is that it controls_______

  • A. posture and balance of the body
  • B. all voluntary actions
  • C. temperature and appetite
  • D. many involuntary actions

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

  • A. contracts and the eye lens gets thicker
  • B. relaxes and the eye lens gets thinner
  • C. contracts and the eye lens gets thinner
  • D. relaxes and the eye lens gets thicker

19. The main function of the amniotic fluid is for______________

  • A. respiration in the foetus
  • B. protection of the foetus from shock
  • C. Lubricating the birth canal foetus
  • D. nourishing the foetus

20.  4

The diagram above is an illustration of the longitudinal section of a flower. Study it and answer this question

Which part of the flower is responsible for the protection of young flower buds?

21. The essential parts of the flower are labelled_______

  • A. I, II and III
  • B. II, III and IV
  • C. III, V and VI
  • D. IV, V and VI

22.  Deficiency in insulin could lead to________

  • A. cirrhosis
  • B. hepatitis
  • C. diabetes
  • D. nephritis

23. Which of the following forms of energy is utilized during photosynthesis?

  • A. Potential
  • B. Kinetic
  • C. Solar
  • D. Chemical

24. Light is excluded from a water culture experiment in order to________

  • A. prevent overheating of the roots
  • B. enable the roots to grow straight down
  • C. prevent ionization of water molecules
  • D. prevent the growth of algae

25. The major mineral present in the shell of Molluscs is________

  • A. Copper
  • B. Sodium
  • C. Iron
  • D. Calcium

26. The digestion of proteins starts in the______

  • A. small intestine
  • B. stomach
  • C. large intestine
  • D. mouth

27. Tooth decay is usually caused by___________

  • A. undigested and absorbed food
  • B. eating a limited amount of sweetened food.
  • C. the bacteria in the mouth that metabolize sugar to acids
  • D. eating a lot of proteinous foods

28. The conversion of ammonium salts into nitrates is called_______

  • A. putrefaction
  • B. denitrification
  • C. fixation
  • D. nitrification

29. The salinity of a brackish habitat________

  • A. increases immediately after rainfall
  • B. increases at the end of the rain
  • C. decreases with an increase in the number of organisms
  • D. increases during the dry season

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

  • A. 0.09
  • B. 0.90
  • C. 9.00
  • D. 90.00

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