Enzyme required for fertilization of sperm and ovum is located in the ......... of sperms.

Arrange in correct sequence the structures formed during spermatogenesis

$(a)$ Spermatogonia

$(b)$ Secondary spermatocyte

$(c)$ Primary spermatocyte

$(d)$ Spermatid

Meiotic division during oogenesis is different from that in spermatogenesis. Explain how and why ?

Which one of the following statements is false in respect of viability of mammalian sperm?

Spermatogonia undergo ....... to produce spermatozoa

$A$ -Spermatids formed from secondary spermatocytes.

$R$ -The spermatids are transformed into spermatozoa by the process called spermiogenesis.