Primary germ layers are formed during __________
A) implantation
B) cleavage
C) conception
D) organogenesis
E) gastrulation

Question

Quizplus · Accepted Answer

Primary germ layers are formed during gastrulation, which is the process where the blastula (a hollow ball of cells formed by cleavage) invaginates to form the three different layers (ectoderm, endoderm, and mesoderm) that will eventually give rise to all the body's tissues and organs. Implantation, cleavage, conception, and organogenesis are all important stages of development, but they do not result in the formation of the primary germ layers.

Primary Germ Layers Are Formed During __________