$A$ – Acrosome possesses mitochondria.

$R$ -Middle piece of sperm is filled with enzymes

Insemination is

Secondary oocyte is ……….

Androgen stimulates the $…A…$ FSH acts on the $…B…$ and stimulates factors for spermiogenesis. Here $A$ and $B$ refers to

Release of spermatozoa from urethra by male animals is called