If gastrulation were blocked by an environmental toxin, then
A)cleavage would not occur in the zygote.
B)embryonic germ layers would not form.
C)fertilization would be blocked.
D)the blastula would not be formed.
E)the blastopore would form above the grey crescent in the animal pole.

Question

Quizplus · Accepted Answer

Gastrulation is the process by which the three embryonic germ layers (endoderm, mesoderm, and ectoderm) form. If gastrulation were blocked, then the embryonic germ layers would not form properly, leading to developmental abnormalities or even embryonic mortality.

If Gastrulation Were Blocked by an Environmental Toxin, Then