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Which one of the following statements is correct?
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- Geitonogamy involves the pollen and stigma of flowers of different plants
- Cleistogamous flowers are always autogamous
- Xenogamy occurs only by wind pollination
- Chasmogamous flowers do not open at all
Correct Option: B
Cleistogamous flowers do not expose their reproductive parts. Anthers and stigma lie close to each other. Pure autogamy occurs since there is no chance of cross-pollination. Cleistogamy is the most efficient floral adaptation for promoting self-pollination. E.g., Viola mirabilis and Oxalis autosella.
