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2.Human Reproduction
normal
Epiboly is the process of
A
Rotation of gastrula within vitelline membrane so that animal pole becomes anterior
B
Overgrowth of micromeres which divide rapidly and spread downward over megameres except at yolk plug
C
Mass migration of cells from animal hemisphere so that upper micromeres migrate over edge of dorsal lip, roll inside and tucked beneath outer layer
D
Formation of small slit like invagination upon grey crescent
Solution
Epiboly – descending of dividing cells to cover other cells.
Invagination – tucking in blastula wall.
Emboly – Upward movement of dividing cells underneath the cells
Standard 12
Biology
