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WAEC Agricultural Science 2003 Question 38

Question 38

Crop Improvement

Improvement of yam through breeding is difficult because

  1. A.it possesses no sexual reproductive system
  2. B.naturally growing wild types have to be used
  3. C.its rapid multiplication is very difficult
  4. D.its genes do not segregate
Show the answer and explanation

Answer: A (it possesses no sexual reproductive system)

Explanation

Most cultivated yams rarely flower or set seed, so crossing them is hard.