A(n)___ is an embryonic form with three primary tissue layers.
A) zygote
B) gastrula
C) blastula
D) mesoderm
E) embryo

Question

Quizplus · Accepted Answer

A gastrula is an embryonic form that develops after the blastula stage and has three primary tissue layers: endoderm, mesoderm, and ectoderm. The other options are incorrect: 
A) A zygote is a single cell formed by the fusion of a sperm and an egg. 
C) A blastula is an early stage embryo consisting of a hollow ball of cells. 
D) Mesoderm is one of the three germ layers that forms during gastrulation. 
E) An embryo is an early stage of development after fertilization.

A(n)___ Is an Embryonic Form with Three Primary Tissue Layers