During embryonic development, the establishment of polarity along anterior/ posterior, dorsal/ventral or medial/lateral axis is called

In the first phase of gastrulation of amphibians there occurs the separation of

True coelom is a space between the body wall and alimentary canal. It is lined by

Which centriole of spermatozoa is required for first cleavage?

The embryo of man is protected by

Testes in rabbit are