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WAEC Agricultural Science 2012 Question 33

Question 33

Crop Diseases

Which of the following statements about the effects of diseases on crops are true? Reduction in
I. quality of produce.
II. photosynthetic ability.
III. cost of production.
IV. yield of the produce.

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

Answer: D (I, II and IV only)

Explanation

Diseases lower quality, photosynthesis and yield; they raise, not reduce, the cost of production.