WAEC Biology 1991 (August) Question 48

Question 48

Microorganisms and Health

Below is a list of microorganisms which are of economic importance to man.
I. Plasmodium II. Vibrio choleroe III. Gonococcus sp IV. Poliomyelitis virus V. Syphilis bacteria.
Which of the following organisms are transmitted by houseflies?

  1. A.I and II only
  2. B.II and V only
  3. C.III and IV only
  4. D.II and IV only
  5. E.III and V only
Show the answer and explanation

Answer: D (II and IV only)

Explanation

Houseflies carry germs from faeces to food; cholera (II) and polio (IV) spread this way.