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 431: A tall plants crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents? Options:
  A) TT, TT
  B) Tt, tt
  C) TT, tt
  D) Tt, Tt
  Show Answer
  The correct answer is B .
• Question 432: Haemophilia results from the mutation of the genes Options:
  A) in the sex chromosome
  B) which control skin colour
  C) which control the mechanism for blood-clotting
  D) which control the formation of haemoglobin
  Show Answer
  The correct answer is C .
• Question 433: Th chitin in the exoskeleton of many arthropods is strengthened by Options:
  A) calcium compounds
  B) organic salts
  C) lipids
  D) proteins
  Show Answer
  The correct answer is A .
• Question 434: A pollutant that is mostly associated with acid rain is Options:
  A) Nitrogen (IV) Oxide
  B) Ozone
  C) Fluorine
  D) Carbon (IV) Oxide
  Show Answer
  The correct answer is A .
• Question 435: What do bacteria in root nodules derive from the host plant? Options:
  A) Protection and minerals
  B) Water and minerals
  C) Carbonhydrates and water
  D) Protection and carbohydrates
  Show Answer
  The correct answer is A .
• Question 436:

  The system of classification in which there are seven hierarchies from kingdom to species was introduced by?

  Options:
  A) Felix Dujardin
  B) Carolus Linneus
  C) Theodore Schwann
  D) Charles Darwin
  Show Answer
  The correct answer is B .
• Question 437:

  

  The diagram represents

  Options:
  A) sensory neurone
  B) relay neurone
  C) afferent neurone
  D) motor neurone
  Show Answer
  The correct answer is D .
• Question 438: One disease NOT caused directly by bacteria is Options:
  A) malaria
  B) tuberculosis
  C) pneumonia
  D) tetanus
  E) cholera
  Show Answer
  The correct answer is A .
• Question 439:

  

  In the diagram, which of the animals represents the oldest creatures in terms of evolutionary history?

  Options:
  A) iii
  B) ii
  C) i
  D) iv
  Show Answer
  The correct answer is D .
• Question 440: If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of Options:
  A) codominance
  B) incomplete dominance
  C) mutation
  D) linkage
  Show Answer
  The correct answer is B .