Question

The flower which expose their mature anther and stigma to the pollinating agent is called

• A. cleistogamy
• B. autogamy
• C. semigamy
• D. chasmogamy

Answer 1

The correct option is D chasmogamy

The chasmogamous flowers are open with their anther and stigma exposed for pollination. In these flowers, two types of pollinations take place:

Self-Pollination: Self-pollination occurs when both the anther and the stigma mature simultaneously and come in contact with each other.

Cross-Pollination: This type of pollination occurs in self-incompatible plants. In this, the anther and the stigma mature at different times so cannot come in contact with each other. Cross-pollination is of two types:

• Geitonogamy– When the pollen grains from the anther transfer to the stigma of a different flower in the same plant, it is known as geitonogamy.
• Xenogeny– When the pollen grains from the anther of a flower get transferred to the stigma of a flower in some other plant, it is known as xenogeny. This process carries genetically different pollen to the stigma.