Epiboly
A) is a form of convergent extension displayed during gastrulation.
B) occurs when a sheet of cells rolls inward to form an inner layer.
C) occurs when rows of cells move apart from one another.
D) is the process by which animal hemisphere cells flatten and spread toward the site of involution during frog gastrulation.
E) occurs when a sheet of cells bends inward.

Question

Quizplus · Accepted Answer

Epiboly refers to the movement where cells of the animal hemisphere spread and thin over the embryo's surface, as seen in frog gastrulation. It does not involve convergent extension (A), rolling inward to form an inner layer (B), cells moving apart (C), or bending inward (E).