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 121: Adaptive features of plants to desert conditions include Options:
  A) thick barks, succulent stems and sunken stomata
  B) thin barks, succulent stems and sunken stomata
  C) thin barks, air floats on stems and sunken stomata
  D) air spaces in tissues, adventitious roots and thick barks
  Show Answer
  The correct answer is A .
• Question 122: The mammalian pancreas is involved with the Options:
  A) digestion of food only
  B) digestion and absorption of food
  C) digestion of food and regulation of blood sugar
  D) digestion of food, production of hormone and the regulation of blood
  E) digestion of food, and the regulation of blood
  Show Answer
  The correct answer is D .
• Question 123: Unlike auxins, gibberellins Options:
  A) induces the formation of adventitious roots
  B) do not affect leaf and fruit abscission
  C) cannot stimulate stem elongation
  D) are quite effective as herbicides
  Show Answer
  The correct answer is B .
• Question 124:

  

  Which ecological factor exerts the greatest influence on the structure of the profiles?

  Options:
  A) Topographic
  B) Edaphic
  C) Biotic
  D) Climatic
  Show Answer
  The correct answer is D .
• Question 125:

  In the mammalian respiratory system. exchange of gases occurs in the?

  Options:
  A) lungs
  B) bronchi
  C) bronchioles
  D) alveoli
  Show Answer
  The correct answer is D .
• Question 126: The production of violet colouration, when dilute NaOH solution is added to a solution of food substance, followed by drops of 1% CuSO₄ solution while shaking, indicates the presence of Options:
  A) protein
  B) carbohydrates
  C) fats
  D) reducing
  Show Answer
  The correct answer is A .
• Question 127: Hydra removes undigested food by Options:
  A) passing it through the anus
  B) passing it through the mouth
  C) means of a contractile vacuole
  D) egesting it through the body surface
  Show Answer
  The correct answer is B .
• Question 128: The dry indehiscent, winged fruit formed from one one carpel is known as Options:
  A) Schizocarp
  B) Caryopsis
  C) Samara
  D) Nut
  E) Follicle
  Show Answer
  The correct answer is C .
• Question 129: Which of the following is NOT true of wind-pollinated flowers? Options:
  A) A large amount of pollen produced
  B) Light smooth pollen grains
  C) Small inconspicuous flowers
  D) Scented petals
  E) Large pendulous anther
  Show Answer
  The correct answer is D .
• Question 130: The butterfly is of great economic importance because Options:
  A) of its use in scientific studies
  B) it sucks nectar from flowers
  C) it adds to the beauty of the enviroment
  D) it polllinates flowers of crops and other plants
  Show Answer
  The correct answer is D .