Fertilisin is a chemical substance produced from

Mature eggs (ovum)

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Acrosome

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Polar bodies

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Middle piece of sperm

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Solution

The correct option is A Mature eggs (ovum)
Fertilisin is a chemical substance secreted by the mature egg (ovum). It is composed of glycoproteins i.e. monosaccharides and amino acids. It ensure fertilization by allowing the sperm adhere to the egg. It further clumps other sperms around the egg to avoid polyspermy i.e. avoid entry of additional sperms.

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