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WAEC Agricultural Science 1991 (August) Question 24

Question 24

Crop Improvement

Which of the following crops cannot be easily improved by cross-breeding?

  1. A.Groundnut
  2. B.Cowpea
  3. C.Oil palm
  4. D.Maize
  5. E.Yam.
Show the answer and explanation

Answer: E (Yam.)

Explanation

Yam is propagated by tubers and seldom produces viable seed, so crossing it is difficult.