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