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 321: 28 g soil sample was heated to a constant weight of 24 g. When further heated to red hot and cooled, it weighed 18 g. What is the percentage of humus in the soil? Options:
  A) 22.2
  B) 55.6
  C) 75.0
  D) 25.0
  E) 35.7
  Show Answer
  The correct answer is A .
• Question 322:

  

  Use the diagram to answer the question that follows.

  The dentition is found in

  Options:
  A) rat
  B) dog
  C) sheep
  D) man
  Show Answer
  The correct answer is D .
• Question 323:

  

  After circulation in the lungs, the blood returns to the left auricle through

  Options:
  A) 1
  B) 4
  C) 5
  D) 6
  Show Answer
  The correct answer is D .
• Question 324: If a ring of bark and phloem is removed from a stem, the Options:
  A) plant dies immediately
  B) plant dies after two days
  C) movement of food is not affected
  D) movement of minerals is hardly affected
  Show Answer
  The correct answer is D .
• Question 325: In a breeding program a cross was made between two true breeding cow-pea types: one with round seeds and the other with wrinkled seed. If roundness is dominant why wrinkleness is recessive, in the first filial generation all the seeds produced will be Options:
  A) 25% wrinkled, 75% round
  B) 100% wrinkled
  C) 50% wrinkled, 50% round
  D) 75% wrinkled, 25% round
  E) 100% round
  Show Answer
  The correct answer is E .
• Question 326:

  In the egg of a bird, the embryo is located in the

  Options:
  A) Chalaza
  B) Yolk
  C) Albumen
  D) Embryo disc
  Show Answer
  The correct answer is B .
• Question 327: The causative agent of Poliomyelitis is Options:
  A) Virus
  B) Fungus
  C) Protozoan
  D) Bacterium
  Show Answer
  The correct answer is A .
• Question 328:

  

  Use the diagram above to answer this question.

  Which of the following will be true of dog ll which lost its tail in an accident if it mates with dog lll.

  Options:
  A) None of its offspring will be born without a tail
  B) 3/4 of its offspring will be born without tails
  C) All its offspiring will be born without tails
  D) 1/4 of its offspring will be born without tails
  Show Answer
  The correct answer is A .
• Question 329: The stream-lined shape of fishes is an adaptation for Options:
  A) Securing mates
  B) easy movement
  C) obtaining food
  D) defence and attack
  Show Answer
  The correct answer is B .
• Question 330:

  

  All the cell bodies in the spinal cord are found in

  Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is A .