A blastula which is solid, is known as
Stereoblastula
Coeloblastula
Superficial blastula
Discoblastula
Function of gynogamone$-I$ is
The primordial germ cells make their appearance from wall of
The extra-embryonic membranes of mammalian embryo are derived from
In vertebrates the central nervous system devlops under the influence of
The yolk plug is a structure in gastrula which is formed by the protrusion of