After ovulation,the Graafian follicle transforms into:

Meiotic division during oogenesis is different from that in spermatogenesis. Explain how and why?

In human females,meiosis-$II$ is not completed until $..........$.

Which part of the sperm is formed from the centriole?

The fluid-filled cavity called the $Antrum$ is found in which of the following?

For normal fertility,at least ....... of the sperm in a human ejaculate must have normal shape and size,and at least ...... of them must show vigorous motility.