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 31: In the standard experiment to show that oxygen is given off during photosynthesis, sodium bicarbonate is used to Options:
  A) neutralize the acid in water
  B) supply mineral salt to water plant
  C) supply carbondioxide for photosynthesis
  D) kill micro-organisms in water
  Show Answer
  The correct answer is B .
• Question 32: Which of the following stimuli is likely to elicit a nastic response in an organism? Options:
  A) Touch
  B) Light intensity
  C) Chemical substances
  D) Gravity
  Show Answer
  The correct answer is C .
• Question 33:

  

  In the diagram, the likely pollinating agent of the flower is

  Options:
  A) wind
  B) water
  C) insect
  D) man
  Show Answer
  The correct answer is C .
• Question 34: The mammalian endocrine system is responsible for Options:
  A) transmitting impulse
  B) regulating body temperature
  C) regulating osmotic pressure of blood
  D) chemical co-ordination
  E) the manufacture of blood
  Show Answer
  The correct answer is D .
• Question 35: In which of the following crosses will all the female offspring be colour blind? Options:
  A) colour blind mother x colour blind father
  B) colour blind mother x normal father
  C) carrier mother x colour blind father
  D) carrier mother x normal father
  Show Answer
  The correct answer is A .
• Question 36:

  Which of the following cycles involves the process of precipitation and transpiration?

  Options:
  A) water cycle
  B) carbon cycle
  C) nitrogen cycle
  D) oxygen cycle
  Show Answer
  The correct answer is A .
• Question 37: The hereditary material in a cell is known as Options:
  A) ADP
  B) CNS
  C) RNA
  D) ATP
  E) DNA
  Show Answer
  The correct answer is E .
• Question 38: Which of the following scenarios is an example of cohesion? Options:
  A) Water molecules stick to the surface of a mirror.
  B) Water sticks to the walls of blood vessels.
  C) Water molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.
  D) Water molecules stick to one another and form a bead
  Show Answer
  The correct answer is D .
• Question 39:

  One of the following is an effect of clay soil on vegetation

  Options:
  A) Supports luxuriant vegetation such as forest
  B) Supports scanty vegetation
  C) Does not support light vegetation
  D) Support arid vegetation
  Show Answer
  The correct answer is A .
• Question 40:

  The following processes are involved during expiration in man except

  Options:
  A) The inter costal muscles relax
  B) The thoracic activity first increases in volume
  C) The sternum moves inward
  D) The ribs are moved downwards and inwards
  Show Answer
  The correct answer is B .