$I.$ Sperm cells,when released from the body and placed in a petri plate,remain alive for a much longer duration.
$II.$ Semen contains chemicals that cause the female's smooth muscles to contract.

Where does the structural transformation of sperm occur?

Eggs which contain a very small amount of yolk are called:

Given below are two statements:
Statement $I$: Ovulation is caused by $LH$ surge leading to rupture of Graafian follicles.
Statement $II$: Graafian follicle remaining after ovulation transform into corpus luteum and secretes large amount of estrogen.
In the light of the above statements, choose the most appropriate answer from the options given below:

Select the incorrect statement.

Release of spermatozoa from the urethra by male animals is called: