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JAMB Biology 2002 Question 6

Question 6

Microorganisms and Health

When oil is poured into the breeding site of mosquitoes, it

  1. A.deprives the larvae of water
  2. B.kills the adults
  3. C.suffocates the pupae
  4. D.slows down egg development
Show the answer and explanation

Answer: C (suffocates the pupae)

Explanation

Mosquito larvae and pupae breathe air through tubes at the water surface. A film of oil blocks these tubes, so the pupae (and larvae) suffocate.