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 471: The exchange of genes between homologous chromosomes is called Options:
  A) test cross
  B) back cross
  C) crossing-over
  D) mutation
  Show Answer
  The correct answer is C .
• Question 472: The following are methods of soil conservation EXCEPT Options:
  A) contour terracing
  B) strip cropping
  C) contour ploughing
  D) mixed grazing
  Show Answer
  The correct answer is D .
• Question 473: The mineral nutrient that is most bound to the soil is Options:
  A) phosphorus
  B) calcium
  C) iron
  D) potassium
  Show Answer
  The correct answer is C .
• Question 474: The hepatic portal vein is unique because it Options:
  A) carries deoxygenated blood
  B) begins and ends with capillaries
  C) is the largest vein in mammals
  D) carries digested food
  E) is the shortest vein in mammals
  Show Answer
  The correct answer is D .
• Question 475:

  Use the diagram to answer the question

  The neural arch is labelled

  Options:
  A) i
  B) ii
  C) iii
  D) iv
  Show Answer
  The correct answer is B .
• Question 476: The glottis is the opening which leads to the Options:
  A) Oesophagus
  B) Larynx
  C) Nostrils
  D) Pharynx
  E) Mouth
  Show Answer
  The correct answer is B .
• Question 477: A certain savanna grasshopper changes colour from green during the rainy season to brown during the dry season and black after dry season bush fires. The reason for these colour changes is that the Options:
  A) grasshopper is getting older
  B) environmental temperature is changing
  C) grasshopper is avoiding predation
  D) grasshopper is frequently moulting
  Show Answer
  The correct answer is C .
• Question 478:

  

  Which of the labelled part in the figure above will develop into new bulb?

  Options:
  A) 1
  B) 4
  C) 2
  D) 3
  E) 5
  Show Answer
  The correct answer is D .
• Question 479: During the bending of the arm, the biceps muscles Options:
  A) contracts and the triceps muscles relaxes
  B) relaxes and the triceps muscles contracts
  C) and the triceps muscles contract
  D) and the triceps muscles relax
  Show Answer
  The correct answer is A .
• Question 480: The least evidence in support of the theory of evolution is provided by the study of Options:
  A) anatomy
  B) ecology
  C) geology
  D) embryology
  Show Answer
  The correct answer is B .