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 731: The major function of the swim-bladder in fishes is Options:
  A) breathing
  B) buoyancy
  C) swimming
  D) diving
  Show Answer
  The correct answer is B .
• Question 732: The first four children of a couple were all girls. The probability that the fifth will also be a girl is Options:
  A) 1/5
  B) 1/4
  C) 1/3
  D) 1/2
  Show Answer
  The correct answer is D .
• Question 733:

  

  Use the diagram shown to answer the question. In plant cells, the role of the membrane is played by the

  Options:
  A) nucleolus
  B) cell wall
  C) cytoplasm
  D) mitochondrion
  Show Answer
  The correct answer is B .
• Question 734:

  

  Use the diagram above to answer this question.

  The animal represented by l is a

  Options:
  A) poikilotherm
  B) homoiotherm
  C) carnivore
  D) herbivore
  Show Answer
  The correct answer is B .
• Question 735: Substance manufactured by the leaves are transported to other parts of the plant through the Options:
  A) phloem
  B) companion cells
  C) sieve tubes
  D) cambium
  Show Answer
  The correct answer is A .
• Question 736:

  

  Use the diagram above to answer this question. The structure labelled l is

  Options:
  A) photosensitive
  B) radiosensitive
  C) chemoreceptive
  D) tactile
  Show Answer
  The correct answer is D .
• Question 737: In an experiment to determine the percentage of air in a soil sample, the following readings were recorded: volume of water in measuring cylinder = 500 cm³volume of soil added to water = 350 cm³volume of water and soil after stirring = 800 cm³the percentage of air in the soil sample is Options:
  A) 6.25%
  B) 10.36%
  C) 14.28%
  D) 43.28%
  Show Answer
  The correct answer is A .
• Question 738: One of the advantages of outbreeding is Options:
  A) pests tolerance
  B) disease resistance
  C) fast growth
  D) tall height
  Show Answer
  The correct answer is B .
• Question 739: Enzyme ptyalin acts on starch in the Options:
  A) oesophagus
  B) large intestine
  C) mouth
  D) stomach
  Show Answer
  The correct answer is C .
• Question 740: Which of the following is true of leucocytes? Options:
  A) they are respiratory pigments
  B) they are most numerous and ramify all cells
  C) they are large and nucleated
  D) they are involved in blood clotting
  Show Answer
  The correct answer is C .