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Explain the steps that ensure cross poll...

Explain the steps that ensure cross pollination in an autogamous flower.

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(i)Removal of anthers from the flower bud in case of bisexual flower before the anther dehisces (Emasculation)
(ii)Covering emasculated flowers with a bag of suitable size and generally made up of butter paper (Bagging )
(iii)Dusting of desired pollen grain on stigma of bagged fower when the stigma of bagged flower attains receptivity and then rebagging it.
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