Question

Unisexuality of flowers prevents which process?

• A. Both Geitonogamy and Xenogamy
• B. Geitonogamy, but not Xenogamy
• C. Autogamy and Geitonogamy
• D. Autogamy, but not Geitonogamy

Hint:

Unisexual flowers prevent geitonogamy (self-pollination on the same plant) but allow xenogamy (cross-pollination between plants).

Answer 1

The Correct Option is B

Unisexuality of flowers (having either male or female parts, not both) prevents self-pollination. Geitonogamy is self-pollination between flowers on the same plant, which unisexuality prevents. Xenogamy (cross-pollination between different plants) can still occur. Autogamy (self-pollination within the same flower) is also prevented, but the question focuses on the process most directly affected, which is geitonogamy.