Which organelle is important for spermiogenesis and forms the acrosome?

In the testis,the immature germ cells produce sperm by $...A...$ at puberty. $...B...$ present on the inside wall of seminiferous tubules multiply by $...C...$ division and increase their number. Identify $A$,$B$,and $C$ from the above statement.

How many spermatozoa are produced from a single primary spermatocyte?

Massive amount of yolk present in the vegetal region of the egg makes an egg:

In which of the following are 'homolecithal' (isolecithal) eggs found?

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