Sperm’s acrosome has

Identify the hormones that are secreted in large amount prior to ovulation :

$A.$ $LH$

$B.$ $FSH$

$C.$ $Estrogen$

$D.$ $Progesterone$

Zonary placenta is found in

The breakage of the membrane surrounding the acrosome in a mammalian sperm is

In which animal the testes are abdominal during embryonic stages but migrate to scrotum just before birth where they remain throughout life