1.

Which is not included in three layers ofgerminal layers of gastrula ?(A) Ectoderm(B) Mesoderm(C) Endoderm(D) Zona pellucida47.

Answer»

Germ layer, any of three primary cell layers, formed in the earliest stages of embryonicdevelopment, consisting of the endoderm (innerlayer), theectoderm(outer layer), and the mesoderm (middle layer).hence option d

your answer is here, zona pellucida



Discussion

No Comment Found