At puberty,how many primary follicles are left in each ovary?

Which of the following observations does $NOT$ provide evidence that the pattern of cleavage is determined by factors in the egg cytoplasm rather than by the genes of the zygote?

Which of the following is true regarding sperm?

What does a Graafian follicle contain?

Which hormone regulates the corpus luteum?

Spermatogonia undergo a series of cell divisions to produce sperms. Select the correct statements from the following:
$A$. Spermatogonia always undergo meiotic cell division.
$B$. Primary spermatocytes divide mitotically to produce secondary spermatocytes.
$C$. Secondary spermatocytes, through their second meiotic division, produce spermatids.
$D$. Spermatids produce spermatozoa through mitosis.
$E$. Spermatids transform into spermatozoa by spermiogenesis.
Choose the correct answer from the options given below: