The formation of the endoderm during gastrulation in frogs results from
A) movement of cells from the surface layer to the interior.
B) migration of cells within the blastocoel.
C) formation of columnar cells at the vegetal pole.
D) rapid cell division.
E) migration of secondary mesenchyme cells.

Question

Quizplus · Accepted Answer

The endoderm is formed by the movement of cells from the surface layer to the interior during gastrulation in frogs. This process is known as involution, as cells at the dorsal lip of the blastopore fold inward and move to the interior, eventually forming the endoderm.

The Formation of the Endoderm During Gastrulation in Frogs Results