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Given below is th

Answer :

(a) Sperm ‘A’ is able to penetrate the wall of ova may fertilize the ovum, whereas B and C are unable to penetrate wall of ova and they will degenerate.

(b) Zona pellucida make sure that only one sperm enters into the ovum.

(c) Entry of sperm induces completion of meiotic division of the secondary oocyte which results in the formation of second polar body and a haploid ovum.

(d) Entry of a sperm into the ovum is facilitated by an enzyme present in the acrosome of a sperm.

(e) Ampullary-isthmic junction of the fallopian tube is the place where sperm enters ova.

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