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JAMB Biology 1985 Question 31

Question 31

Reproduction in Plants

If a flower is protandrous then it

  1. A.must be unisexual
  2. B.has an undeveloped androecium
  3. C.has no androecium
  4. D.must be insect-pollinated
  5. E.can prevent self-pollination.
Show the answer and explanation

Answer: E (can prevent self-pollination.)

Explanation

In a protandrous flower the anthers ripen before the stigma, so its own pollen is usually shed before the stigma can receive it. This prevents self-pollination.