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JAMB Biology 1993 Question 44

Question 44

Microorganisms and Health

What ecological condition favours the breeding of black flies?

  1. A.Fresh water habitat
  2. B.Water in ponds and swamps
  3. C.Water in small containers
  4. D.Fast flowing streams.
Show the answer and explanation

Answer: D (Fast flowing streams.)

Explanation

Black-fly (Simulium) larvae attach to rocks in fast-flowing rivers and streams, which is why river blindness is common near rapids.