Question

In which one of the following pollinations, is autogamous?

• A. Cleistogamy
• B. Xenogamy
• C. Chasmogamy
• D. Geitonogamy

Answer 1

The correct option is A

Cleistogamy

The correct option is A.

Explanation for correct option:

1. Cleistogamy refers to the pollination of cleistogamous flowers.
2. Cleistogamous flowers do not open at all and show self-fertilization or autogamy.
3. These do not depend on the pollinating agents for pollination.

Explanation for incorrect options:

Option B:

1. Xenogamy is referred to the transfer of pollen grains from anther to the stigma of a different plant.
2. In xenogamy, pollination generally occurs between genetically different anther and stigma.

Option C:

1. Chasmogamy is referred as a reproductive mechanism in plants that helps in the cross-pollination of the flowers.
2. Cross-pollination in chasmogamous flowers promotes sexual recombination thus the genetic diversity in the seeds are produced.

Option D:

1. Geitonogamy refers to the cross-pollination between the flowers of the same plant which means different flowers of the same plant.
2. Pollen grains are genetically similar as they come from the same plant.

Final answer: In cleistogamous flowers, pollination is autogamous.