During the embryonic period, what forms the hair and the nervous system?
A) cells in the mesoderm layer
B) cells in the endoderm layer
C) cells in the placenta layer
D) cells in the ectoderm layer

Name: During the embryonic period, what forms the hair and the nervous system? A) cells in the mesoderm layer B) cells in the endoderm layer C) cells in the placenta layer D) cells in the ectoderm layer
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During the embryonic period, the ectoderm layer of cells forms the hair and the nervous system.

During the Embryonic Period, What Forms the Hair and the Nervous