Hair and the nervous system develop during the embryonic period from cells contained in the ____ layer.
a. mesoderm
b. endoderm
c. placenta
d. ectoderm
Question 2
If asked to identify where the hormone that causes the maturation of the genitals in females comes from, you should say,
a. the pituitary gland..
b. the ovaries..
c. the fallopian tube..
d. the adrenal gland..
