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Flowering plants have developed many dev...

Flowering plants have developed many devices to discourage self-pollination and to encourage cross-pollination. Explain three such devices.

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Verified by Experts

See Q.11, Set-II., Outside Delhi-2015. and see also for third devices :
The third device to prevent self pollination is self-incompatibility. Its is a genetic mechanism and prevents self-pollen from fertilising the ovules by preventing pollen germination or pollen tube growth in the pistil.
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