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 1681: What is the genetic ratio of a cross between homozygous tall plant and a homozygous dwarf plant? Options:
  A) 0 tall : 4 short
  B) 3 tall : 1 short
  C) 2 short : 2 tall
  D) 1 tall : 1 short
  E) 4 tall : o short
  Show Answer
  The correct answer is E .
• Question 1682: The primary structure responsible for pumping blood for circulation through the mammalian circulatory systems is the Options:
  A) veins
  B) right auricle
  C) arteries
  D) left ventricle
  Show Answer
  The correct answer is D .
• Question 1683: The lumbar vertebra when compared with a thoracic vertebra has a Options:
  A) longer neural spines
  B) wider neural canal
  C) thicker centrum
  D) shorter transverse process
  Show Answer
  The correct answer is C .
• Question 1684: In dicotyledonous stem, each companion cell is founded beside the Options:
  A) endodermal cell
  B) xylem vessel
  C) sieve tube
  D) pericyclic fibre
  Show Answer
  The correct answer is C .
• Question 1685: A mosquito which produces eggs which float, and whose larvae lie horizontal to the water surface, also rests at the angle on a vertical surface. This type of mosquito is Options:
  A) Aedes
  B) Anopheles
  C) Culex
  D) Tiger mosquito
  E) none of the above
  Show Answer
  The correct answer is B .
• Question 1686:

  

  Which of these plays no role in photosynthesis?

  Options:
  A) 9
  B) 8
  C) 5
  D) 2
  E) 3
  Show Answer
  The correct answer is D .
• Question 1687: If a baby is a female, her mother's ovum must have been fertilized by a sperm carry the chromosome Options:
  A) X
  B) XY
  C) XX
  D) YY
  E) Y
  Show Answer
  The correct answer is A .
• Question 1688:

  

  The function of the structure labelled G is to

  Options:
  A) carry out initial photosynthesis for the seedlings
  B) protect the young leaves from mechanical damage
  C) protect the young leaves from sun light
  D) protect the young leaves from insects pest
  Show Answer
  The correct answer is A .
• Question 1689:

  

  The structure labelled X is used by the organism in the same way as man uses his

  Options:
  A) oesophagus
  B) trachea
  C) stomach
  D) intestine
  Show Answer
  The correct answer is A .
• Question 1690:

  

  The type of placentation shown is

  Options:
  A) axial
  B) marginal
  C) parietal
  D) central
  Show Answer
  The correct answer is B .