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

Name the cells which provide nourishment to the spermatogonia.

After the completion of which process is the secondary oocyte released from the ovary under the influence of the $LH$ hormone?

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

Spermatogenesis is affected by which of the following?

$.....P.....$ undergo meiosis to form sperms. $.....Q.....$ provide nutrition to the germ cells.
Choose the correct option for $P$ and $Q$.
$\quad\quad\quad\quad P \quad\quad\quad Q$