The extraembryonic membrane that forms blood is the
A) yolk sac.
B) amnion.
C) allantois.
D) chorion.
E) decidua.
Correct Answer:
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Q29: Shortly after gastrulation, the body and organs
Q30: A blastocyst is a(n)
A) extraembryonic membrane.
B) solid
Q31: During gastrulation,
A) the blastomeres fuse.
B) the placenta
Q32: The region known as the primitive streak
Q33: During early development, the Y chromosome produces
Q35: Under the influence of the trophoblast, maternal
Q36: Which of the following is false concerning
Q37: The solid ball of cells that has
Q38: The ectoderm forms
A) muscle.
B) blood.
C) neural tissues.
D)
Q39: The penetration of the endometrium by the
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