Certain groups of cells move inward from the surface of the blastula in a carefully orchestrated migration called
A)blastulation
B)archenteron formation
C)morula formation
D)gastrulation
E)cleavage

Question

Quizplus · Accepted Answer

Gastrulation is the process in which cells move inward from the surface of the blastula to form the primary germ layers, and ultimately give rise to all of the embryonic tissues. This is a crucial step in the early development of animals. Blastulation is the initial formation of the blastula, which occurs through cleavage divisions of the zygote. Archenteron formation is a later step in gastrulation, when the invagination of cells leads to the formation of a primitive gut or digestive tube. Morula formation is the first stage of embryonic development, immediately following fertilization, in which the zygote undergoes multiple rounds of cell division to form a solid ball of cells.

Certain Groups of Cells Move Inward from the Surface of the Blastula