Biology Exam Past Questions and Answers | JAMB, WAEC and NECO

Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.

• Question 11: Size, colour and fingerprints are examples of ______ Options:
  A) physiological variation
  B) discontinuous variation
  C) morphological variation
  D) adaptive variation
  Show Answer
  The correct answer is C .
• Question 12: Spines and shells on animals are adaptation for Options:
  A) camouglage
  B) chemical defence
  C) physical defence
  D) mimicry
  Show Answer
  The correct answer is C .
• Question 13:

  Epiphytes growing on the branches of trees provide an example of the relationship known as?

  Options:
  A) parasitism
  B) commensalism
  C) saprophytism
  D) holophytism
  Show Answer
  The correct answer is B .
• Question 14: Water in plants is removed as water vapour through the process of Options:
  A) diffusion
  B) osmosis
  C) evaporation
  D) transpiration
  Show Answer
  The correct answer is D .
• Question 15: The path followed by air as it passes through the lungs in mammals is Options:
  A) trachea → bronchi → bronchioles → alveoli
  B) bronchi → trachea → alveoli → bronchioles
  C) trachea → bronchioles → alveoli
  D) bronchioles → alveoli → bronchi →trachea
  Show Answer
  The correct answer is A .
• Question 16:

  

  Why is the part labelled 5 thicker than 6?

  Options:
  A) 5 is the left ventricle and 6 the right ventricle
  B) 6 is the left ventricle and 5 the right ventricle
  C) 5 receives blood from the left auricle and 6 from the right
  D) 5 pumps blood round the body and 6 pumps blood into the lungs
  E) 5 deals with oxygenated blood and 6 deals with deoxygenated blood
  Show Answer
  The correct answer is D .
• Question 17: All the sons of a colour-blind woman will be coloured blind regardless of the state of the father because Options:
  A) the egg determines the phenotype of the son
  B) sons inherit the sex chromosome of their mothers
  C) the father's sex chromosomes is weaker in sons
  D) sex-linked traits express dominance in females
  Show Answer
  The correct answer is D .
• Question 18: A plant parenchyma cell also acts as a supporting tissue when it Options:
  A) becomes flaccid
  B) contains crystals
  C) becomes turgid
  D) is pigmented
  Show Answer
  The correct answer is C .
• Question 19: The mammalian vein which starts with and ends in a capillary network is the Options:
  A) pulmonary vein
  B) mesenteric vein
  C) renal vein
  D) hepatic potal vein
  Show Answer
  The correct answer is D .
• Question 20: One of these is used for excretion in earthworm Options:
  A) Contractile vacuole
  B) Flame cell
  C) Malpighian tubule
  D) Nephridium
  Show Answer
  The correct answer is D .