At the end of first meiotic division, the male germ cells differentiate into
Spermatogonium
Primary spermatocyte
Secondary spermatocyte
Spermatid
Germ cells in mammalian gonads are produced by
A single ejaculation contains $...A...$ to$...B..$. million spermatozoa. Semen has pH of $...C...$ to $...D....$ Its alkalinity helps to neutralize the acidity of urethra. Here $A,B, C$ and $D$ refers to
Release of spermatozoa from urethra by male animals is called
The process by which ova are formed is knwon as
Match the columns.
Column $I$ | Column $II$ | ||
$(a)$ | Mens pubis | $(1)$ | Embryo development |
$(b)$ | Antrum | $(2)$ | Sperm cell |
$(c)$ | Trophoblast layer | $(3)$ | External genitals offemale |
$(d)$ | Mitochondria | $(4)$ | Graafian follicle |