The human central nervous system:
A) begins to form during the fetal stage.
B) is unlike all other vertebrate central nervous systems in its developmental process.
C) begins to form when the embryo is about two weeks old.
D) begins to form when the embryo is about two months old.

Question

Quizplus · Accepted Answer

The human central nervous system begins to form when the embryo is about two weeks old, during the embryonic stage.

The Human Central Nervous System