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Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants3 Marks
Question
List three strategies that a bisexual flower can evolve to prevent self – pollination.
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Answer

Dichogamy: The condition in which the maturation of stigma and anther takes place at different times so as to prevent self – fertilisation.
Heterostyly: In this, anther and stigma are placed at different positions, so the pollens can not come in contact with stigma of the same flower.
Herkogamy: It is the non-transferred of pollen from anther to stigma of the same flower due to a mechanical barrier between anther and stigma.

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