What is the ploidy of the polar body produced during oogenesis?

Give scientific reasons: The spermatids are transformed into spermatozoa by the process called spermiogenesis.

Spermatogenesis is under the regulatory influence of

The question asks for a diagrammatic presentation of developing follicle events in the human ovary. Based on the standard biological sequence of ovarian follicle development:
$1$. Primary follicles develop into secondary follicles.
$2$. Secondary follicles develop into tertiary follicles.
$3$. Tertiary follicles develop into the Graafian (mature) follicle.
$4$. After ovulation, the ruptured follicle transforms into the corpus luteum.
Given the standard sequence, identify the correct labels for $C$ and $E$ in a typical diagram of this process.

Microlecithal eggs are found in

Which of the following is true regarding sperm?