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Question

How can plants prevent self pollination?
  1. Stamen and pistil mature at different times.
  2. All of the above.
  3. Pistil should have increased receptivity for pollens from same plant.
  4. Plants should develop bisexual flowers.

A
All of the above.
B
Stamen and pistil mature at different times.
C
Plants should develop bisexual flowers.
D
Pistil should have increased receptivity for pollens from same plant.
Solution
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  • There are several methods to prevent self-pollination in plants. Bisexual flowers show self-pollination.
  • Chances of self-pollination increases when pistil has increased receptivity for pollen from the same plant. Self-pollination occurs in flowers where the stamen and carpel mature at the same time.
  • Hence, to prevent self-pollination, stamen and pistil must mature at different times.

Thus, the correct answer is option A.

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