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Biology of Humans 4th Edition by Judith Goodenough,Betty McGuire
Edition 4ISBN:Biology of Humans 4th Edition by Judith Goodenough,Betty McGuire
Edition 4ISBN: Exercise 21
The yolk sac
a. is a primary source of nourishment for human embryos.
b. is the embryo's major contribution to the placenta.
c. contains primordial germ cells.
d. encloses the embryo in a fluid-filled sac.
a. is a primary source of nourishment for human embryos.
b. is the embryo's major contribution to the placenta.
c. contains primordial germ cells.
d. encloses the embryo in a fluid-filled sac.
Explanation
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Verified
The yolk sac has less importance in huma...
Biology of Humans 4th Edition by Judith Goodenough,Betty McGuire
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