Question

Which of the following is common 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

The correct option is A.

The explanation of the correct option:

1. Castor and maize are unisexual flowers that has separate sex organs and are present in two different flowers in the same plant.
2. Autogamy which is self-pollination can be prevented as male and female flowers are separate.
3. Geitonogamy refers to the fertilization of flowers by the pollen of different flowers on the same plant.
4. Geitonogamy cannot be prevented as both sex flowers are present on the same plant.

Final answer: Autogamy is prevented but not geitonogamy is common in castor and maize plants.