Changes in both cell shape and cell position occur extensively during
A) gastrulation, but not organogenesis or cleavage.
B) organogenesis, but not gastrulation or cleavage.
C) cleavage, but not gastrulation or organogenesis.
D) gastrulation and organogenesis, but not cleavage.
E) gastrulation, organogenesis, and cleavage.

Question

Quizplus · Accepted Answer

Cell shape and cell position changes occur extensively during gastrulation, where the three germ layers are formed, and during organogenesis, when organs and tissues are formed from the germ layers. Cleavage involves rapid cell division without significant cell shape changes or movement, so it is not the correct answer.

Changes in Both Cell Shape and Cell Position Occur Extensively