The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
Fourth month
Fifth month
Sixth month
Third month
The seminal fluid coagulates on ejaculation due to
The seminiferous tubules of the testis opens into the vasa efferentia by
During the development, the point of entry of sperm in the eggs at fertilization
During gastrulation ....... is formed
In which of the following animal cleavage divisions are restricted to a small part of cytoplasm & nucleus in animal pole of egg