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WAEC Biology 2001 Question 52

Question 52

Microorganisms and Health

Which of these is not correct about the tse-tsefly and mosquito? They

  1. A.harbour protozoa as disease agents
  2. B.possess piercing and sucking mouth parts.
  3. C.have intermediate hosts.
  4. D.inject disease-causing organisms into the blood stream.
Show the answer and explanation

Answer: C (have intermediate hosts.)

Explanation

The tsetse fly and mosquito are themselves the vectors (intermediate hosts) of protozoa; they do not have intermediate hosts.