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Which event ensures that only one sperm can fertilise an ovum?

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Spermiogenesis

Amphimixis

Depolarisation of oocyte plasma membrane

Capacitation

answer is C.

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Detailed Solution

A rapid depolarisation of the egg plasma membrane, which is caused by the fusion of the first sperm, prevents further sperm from fusing and thereby acts as a fast primary block to polyspermy.

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