The formation of endodermal and ectodermal germ layers occurs at ________.
A) blastula formation
B) fertilization
C) cleavage
D) gastrulation

Name: The formation of endodermal and ectodermal germ layers occurs at ________. A) blastula formation B) fertilization C) cleavage D) gastrulation
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Gastrulation is the process in which the blastula develops into a gastrula, forming the three germ layers: endoderm, mesoderm, and ectoderm. Endodermal and ectodermal germ layers are formed during gastrulation.

The Formation of Endodermal and Ectodermal Germ Layers Occurs at ________