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 521: Excretory products responsible for the red, purple and blue colours of flowers are called Options:
  A) alkaloid
  B) tannins
  C) anthocyanins
  D) resins
  Show Answer
  The correct answer is C .
• Question 522: 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 523: The correct increasing order of size for the cell components responsible for heredity is Options:
  A) chromosome → DNA → nucleus → gene
  B) DNA → gene → chromosome → nucleus
  C) chromosome → nucleus → DNA → gene
  D) DNA → gene → nucleus → chromosome
  Show Answer
  The correct answer is B .
• Question 524:

  Petaloid sepals serve the function of

  Options:
  A) carrying out photosynthesis
  B) attracting pollinating agents to a flower
  C) retaining pollen grains in the corolla tubes
  D) protecting the inner floral parts of the flower
  Show Answer
  The correct answer is D .
• Question 525: The correct route for a piece of bread eaten by a mammal is Options:
  A) oral cavity - oesophagus - stomach - ileum - rectum
  B) oral - cavity - stomach - oesophagus - duodenum - ileum - rectum
  C) oral cavity - oesophagus - duodenum - rectum
  D) oral cavity - oesophagus - ileum - stomach - duodenum - rectum
  E) oral cavity - oesophagus - stomach - ileum - duodenum - rectum
  Show Answer
  The correct answer is A .
• Question 526: The following animals is an invertebrate except Options:
  A) flat worms
  B) round worms
  C) chordate
  D) protozoan
  Show Answer
  The correct answer is C .
• Question 527: The parts used by the tapeworm to fasten itself to the host’s intestine are the Options:
  A) Neck and suckers
  B) Hooks and suckers
  C) Rostellum and suckers
  D) Young proglottis and neck
  E) Rostellum, hooks and suckers
  Show Answer
  The correct answer is B .
• Question 528: The plants that grow in deserts or very dry areas are referred to as Options:
  A) mesophytes
  B) hydrophytes
  C) epiphytes
  D) xerophytes
  Show Answer
  The correct answer is D .
• Question 529: The end products of the digestion of fats and oils in mammals are Options:
  A) maltose and fatty acid
  B) amino acids and glucose
  C) fatty acid and fructose
  D) fatty acids and glycerin
  Show Answer
  The correct answer is D .
• Question 530:

  The vitamin which is important in the formation of the retina pigment is

  Options:
  A) Vitamin A
  B) Vitamin B
  C) Vitamin C
  D) Vitamin D
  Show Answer
  The correct answer is A .