1.

Epiboly  is the process of [CBSE PMT 1992]

A. Mass migration of cells from the  animal hemisphere so that upper micromeres begin to migrate over the  edge of the dorsal lip and roll inside and are tucked beneath the outer layer
B. Over growth when the micromeres divide rapidly and begin to spread downwards over the megameres except at the yolk plug
C. Rotation of gastrula within the vitelline membrane so that the animal pole becomes anterior
D. Formation of a small slit like invagination occuring on the gray crescent
Answer» C. Rotation of gastrula within the vitelline membrane so that the animal pole becomes anterior


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