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Mention two strategies evolved to preven...

Mention two strategies evolved to prevent self-pollination in flowers.

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Herkogamy and Heterostyly strategies evolved to prevent self-pollination in flowers.
1) Herkogamy : The anther and the stigma are placed at different positions so that anthers cannot come in contact with the stigma of the same flower. Ex : Hibiscus, Gloriosa.
2) Heterostyly : Styles of the flowers of the same species are in different heights.
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