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
Choose false sentence.
Insemination is
Define spermiogenesis and spermiation.
Movement of sperm is done by
Which one of the following statements is false in respect of viability of mammalian sperm?