A) polar bodies
B) middle piece of sperm
C) acrosome
D) mature eggs
E) Sertoli cells
Correct Answer: D
Solution :
Fertilization involves the union of female gamete (ovum) and male gamete (sperm) which leads to formation of diploid zygote. The migration of sperms towards the ovum is due to chemical substances present at the animal pole of the ovum (chemotaxis) or due to fertilizin. Later is a glycoprotein present, in the ovum, it attracts the antifertilizin (glycoprotein) present on the surface layer of sperm.
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