gastrulation

Written By Unknown on Monday, 12 December 2011 | 19:26

 Which of the following is true regarding gastrulation:

A. Establishes all the three germ layers

B. Occurs at the caudal end of the embryo prior to

its cephalic end

C. Involves the hypoblastic cells of inner cell mass

D. Usually occurs at 4 weeks

Ans. A

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