Which hormone stimulates the development of the corpus luteum?

How many spermatozoa are formed from one secondary spermatocyte?

Name a cell that is found arrested in the diplotene stage for months or years. Comment in $2-3$ lines on how it completes its cell cycle.

Explain why meiosis and gametogenesis are always interlinked?

Given below are two statements :
Statement-$I$ : Each primary oocyte gets surrounded by a layer of granulosa cells and is called a primary follicle.
Statement-$II$ : At puberty,only $60,000-80,000$ primary follicles are left in each ovary.
In the light of the above statements,choose the most appropriate answer from the options given below :

Identify the hormone that acts on the cells required for the nourishment of sperm and stimulates them.