If Gastrulation Were Blocked by an Environmental Toxin,then

Question

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.

Accepted Answer

Gastrulation is the process that forms the three germ layers (ectoderm, endoderm, and mesoderm) that give rise to all the tissues and organs in the developing embryo. If gastrulation were blocked, these germ layers would not form, resulting in a severely compromised or non-viable embryo.