The phenomenon of fertilization was first perceived by
(d)Oscar hertwig $(1875)$ described the fusion of sperm and egg nuclei (fertilization) in sea urchin.
Choose the correct combination of the labelling for the following structure.
The blastopore develops into future
In humans, at the end of the first meiotic division, the male germ cells differentiate into the
Releasing of sperms from seminiferous tubules is called
Ceasation of menstrual cycle at the age of $50$ is called
