Primary spermatocyte differs from spermatogonium in

Germ cells in mammalian gonads are produced by

Given below are two statements :

Statement $I$ :

The release of sperms into the seminiferous tubules

is called spermiation.

Statement $II$ :

Spermiogenesis is the process of formation of sperms from spermatogonia.

In the light of the above statements, choose the most appropriate answer from the options given below:

Ovulation in mammals refers to

The process by which ova are formed is knwon as