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Sexual Reproduction in Plants

In sunflower,...

Question

In sunflower, self pollination is avoided by _________.

A

Protogyny

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B

Unisexuality

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C

Self sterility

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D

Protandry

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Solution

The correct option is D Protandry
A state in androgynous frameworks that is described by the improvement of male organs or development of their items previously the presence of the relating female item hence restraining self-treatment and that is experienced generally in mints, vegetables, and composites.
So, the correct option is 'Protandry'.

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Q. Assertion :Self-pollination helps in purity of races, wastage of pollen is avoided and pollination is sure. Reason: Cleistogamy favours self-pollination.

Q. Sunflower is pollinated by insects while rice is pollinated by wind. Plants can be self or cross-pollinated. Write any two mechanisms existing in nature to promote cross- pollination.

Q. Assertion (A): In protandrous flowers like sunflowers, the stamens mature before the carpels
Reason (R): When stamens and carpels mature at different times, self pollination is not possible and cross pollination becomes inevitable

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