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What are cleistogamous flowers? Write th...

What are cleistogamous flowers? Write their significance.

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It is an adaptation in which bisexual flowers do not open at all as a result of which self pollination becomes inevitable. These flowers produce assured seed even in the absence of pollinators. Anthers and stigma lie close to each other.
Cleistogamous flowers are invariably autogamous as there is no chance of cross pollination
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