The link between mother and embryo through which nutrition, oxygen, and wastes pass is the
A) chorion.
B) placenta.
C) amnion.
D) yolk sac.
E) allantois.
Correct Answer:
Verified
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A) embryonic disk.
B)
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A) trophoblast.
B) blastocyst.
C)
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A) germ cells.
B) lymphatic vessels.
C)
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