During Which Stage of Development Do Cells Arrange Themselves into Three

Question

During which stage of development do cells arrange themselves into three layers?
A) morula
B) cleavage
C) gastrulation
D) organogenesis

Accepted Answer

Gastrulation is the process by which cells arrange themselves into three layers: the endoderm, mesoderm, and ectoderm. This happens during the third week of embryonic development.