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  4. Flowering plants have developed certain outbreeding devices to discourage self-pollination and encourage cross-pollination. One of these is not an example of such outbreeding device.

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Q. Flowering plants have developed certain outbreeding devices to discourage self-pollination and encourage cross-pollination. One of these is not an example of such outbreeding device.

Sexual Reproduction in Flowering Plants

Solution:

deistogamous flowers are intersexual. They remain closed causing self pollination. Cleistogamy occurs late in the flowering season in some plants, e.g., Commelina, balsam, Oxalis, Viola. These plants possess both chasmogamous and deistogamous flowers. In deistogamous flowers, the anthers dehisce inside closed flowers. Growth of style brings the pollen grains in contact with stigma. Cleistogamy ensures self- pollination.