The figure shows a section of human ovary. Select the option which gives the correct identification of either $A$ or $B$ with function/ characteristic.
$B$ - Corpus luteum - Secretes progesterone
$A$ - Tertiary follicle - Forms Graafian follicle
$B$ - Corpus luteum - Secretes estrogen
$A$ - Primary oocyte - It is in the prophase $I$ of the meiotic division
Define spermiogenesis and spermiation.
At the end of first meiotic division, the male germ cells differentiate into
In humans, at the end of the first meiotic division, the male germ cells differentiate into the
Describe the process of oogenesis.