試題詳解

31. An embryonic cell that is totipotent is one that can __________.
(A)migrate into the center of the blastula during gastrulation
(B)give rise to the entire embryo, by itself, as cleavage proceeds
(C)organize the blastula
(D)redistribute yolk from the vegetal to the animal pole of the frog embryo
(E)move mesodermal cells in the blastocoel