Seminal plasma of humans is rich in
Glucose, certain enzymes and $Ca^{+2}$
Fructose, certain enzymes and $Ca^{+2}$
Fructose, certain enzymes but no $Ca^{+2}$
Glucose, certain enzymes but no $Ca^{+2}$
Saheli is a
A freshly unfertilized egg of hen contains
Match column $I$ with column $II$ and select the correct option using the codes given below.
Column $-I$ | Column $-II$ |
$(A)$ Mons pubis | $(i)$ Embryo formation |
$(B)$ Antrum | $(ii)$ Sperm |
$(C)$ Trophectoderm | $(iii)$ Female externalgenitalia |
$(D)$ Nebenkern | $(iv)$ Graafian follicle |
The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed _________.
Give scientific reasons : When male excites sexually epididymis wall shrinks / contracts.