Question

In castor and maize plants,

• A. autogamy is prevented but not geitonogamy
• B. both autogamy and geitonogamy are prevented
• C. male and female flowers are borne by different plants
• D. the anthers and stigma are placed at different positions to encourage cross pollination

Answer 1

The correct option is A autogamy is prevented but not geitonogamy

• In maize and castor plants, unisexual flowers are present.
• The flowers are known as unisexual when there are separate sex organs in separate flowers.
• However, both the male and female flowers can be present on the same plant. Since there are separate flowers which prevent autogamy.
• But both the flowers are borne on the same plant. This induces the chances of geitonogamy.

Thus, the correct answer is option A.