453
Question
Which of the following is not an outbreeding device used by the plants?
Which of the following is not an outbreeding device used by the plants?
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Solution
The correct option is D Cleistogamy
Outbreeding devices are devices that discourage self-pollination and encourage cross-pollination. It can be of the following types:
1) Unisexuality: Flowers are unisexual so that they either promote geitonogamy or cross-pollination.
2) Dichogamy: Anthers and stigma mature at different times in bisexual flowers.
3) Self-incompatibility: Pollen grains of the flower do not germinate on the stigma of the same flower or flowers of the same plant.
4) Heterostyly: Anther and stigma are placed at different locations.
Cleistogamous flowers are those that remain closed and facilitate self-pollination. Flowers are intersexual.
Outbreeding devices are devices that discourage self-pollination and encourage cross-pollination. It can be of the following types:
1) Unisexuality: Flowers are unisexual so that they either promote geitonogamy or cross-pollination.
2) Dichogamy: Anthers and stigma mature at different times in bisexual flowers.
3) Self-incompatibility: Pollen grains of the flower do not germinate on the stigma of the same flower or flowers of the same plant.
4) Heterostyly: Anther and stigma are placed at different locations.
Cleistogamous flowers are those that remain closed and facilitate self-pollination. Flowers are intersexual.
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