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 1221: 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 1222: The characters by which an organism is recognized are termed its Options:
  A) phenotype
  B) genotype
  C) morphology
  D) anatomy
  E) physiology
  Show Answer
  The correct answer is A .
• Question 1223:

  

  Use the diagram above to answer this question.

  The content of the part labelled lll is usually

  Options:
  A) neutral
  B) alkaline
  C) acidic
  D) saline
  Show Answer
  The correct answer is C .
• Question 1224: 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 1225:

  Which of the following will have the least effect on the rate of change of the numbers in a population

  Options:
  A) Mutation
  B) Food Supply
  C) Disease
  D) Predation
  Show Answer
  The correct answer is A .
• Question 1226: The probability of a baby being a boy or a girl depends on the contribution of the Options:
  A) father's sex cell
  B) father's somatic chromosome
  C) mother's sex cell
  D) mother's X-chromosome
  Show Answer
  The correct answer is A .
• Question 1227: Which of following groups is the most advanced? Options:
  A) Pteridophytes
  B) Bryophytes
  C) Thallophytes
  D) Gymnosperm
  Show Answer
  The correct answer is D .
• Question 1228: In which of the following crosses will all the female offspring be colour blind? Options:
  A) colour blind mother x colour blind father
  B) colour blind mother x normal father
  C) carrier mother x colour blind father
  D) carrier mother x normal father
  Show Answer
  The correct answer is A .
• Question 1229: The following events take place during conjugation in spirogyra 1. The protoplasm of each of the conjugating cell separate from the cell wall to form a Gamete; the gamete of one filament passes through the conjugation tube to meet the gamete of the other filament 2. The zygote soon become surrounded by thick brown wall to become zygospore which burst after a short rest and germinate to produce a new filament 3. The nuclei of the gametes fuse to form a zygote 4. The protuberance meet and where they touch the cell-wall disappear so that a conjugation tube joining the two cell is formed 5. protuberance appear on the wall of the cell of two filament of spirogyra lying side by side opposite one another. Now what is the correct sequence in which the above sequence occur? Options:
  A) 1,2,3,4,5
  B) 1,2,4,5,3
  C) 3,4,5,2,1
  D) 5,4,1,3,2
  E) 5,4,3,1,2
  Show Answer
  The correct answer is D .
• Question 1230: The mouth parts of the housefly are adapted for Options:
  A) Lapping and sponging
  B) Sucking and chewing
  C) Piercing and sucking
  D) Chewing and lapping
  E) Biting and chewing
  Show Answer
  The correct answer is A .