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 931: What is the function of the contractile vacuole in paramecium? Options:
  A) Produces enzymes
  B) Gets rid of excreta
  C) Stores and digest food
  D) Gets rid of excess water
  E) Controls movement
  Show Answer
  The correct answer is D .
• Question 932:

  If both parents are heterozygous for a trait. the probability that an offspring will be recessive for that trait is?

  Options:
  A) 1/2
  B) 1/4
  C) 1
  D) 3/4
  Show Answer
  The correct answer is A .
• Question 933:

  

  In which of the habitats will plants show xeromorphic features most prominently?

  Options:
  A) X
  B) R
  C) P
  D) Q
  Show Answer
  The correct answer is A .
• Question 934: The most important hormone that induces the ripening of fruit is Options:
  A) Ethylene
  B) Indole acetic acid
  C) Gibberallin
  D) Cytokinin
  Show Answer
  The correct answer is A .
• Question 935: The soil type that contain nutrients which are not readily available for plants is Options:
  A) alluvial
  B) clayey
  C) sandy
  D) loamy
  Show Answer
  The correct answer is B .
• Question 936: Sting cells are normally found in Options:
  A) Flatworms
  B) Hydra
  C) Snails
  D) Paramecium
  Show Answer
  The correct answer is B .
• Question 937: Which of the following groups of factors is completely abiotic? Options:
  A) Salinity, tide, plankton, turbidity
  B) Temperaure, pH, soil, insect
  C) Wind, altitude, humidity, light
  D) Conifers, wind, pH, rainfall
  E) Soil, water, bacteria, salinity
  Show Answer
  The correct answer is C .
• Question 938:

  When bacteria swim from cold to warm regions, this is known as

  Options:
  A) positive phototaxis
  B) negative phototaxis
  C) positive thermotaxis
  D) negative chemotaxis
  Show Answer
  The correct answer is C .
• Question 939: An example of plant adaptation to a xerophytic environment is represented by the development of Options:
  A) fleshy tissue and reduced leaves
  B) broad canopy and extensive surface root system
  C) thick barks and broad leaves
  D) rough leaves and shallow root system
  Show Answer
  The correct answer is A .
• Question 940: Night-blindness result from a deficiency of Options:
  A) vitamin E
  B) Vitamin A
  C) Vitamin K
  D) Vitamin C
  Show Answer
  The correct answer is B .