Amnion helps in
Respiration
Excretion
Nutrition
Protection from shocks
Find out $A, B$ and $C$ in the figure given below
The final event in the process of fertilization is
Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled $A, B, C, D.$
Phallic organs in cockroach are related to
Embryo at $16$ -celled stage is called