The first extraembryonic membrane to appear is the
A) chorion.
B) allantois.
C) placenta.
D) yolk sac.
E) amnion.
Correct Answer:
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Q15: The extraembryonic membrane that forms the urinary
Q16: A blastocyst is
A) an extraembryonic membrane that
Q17: The study of the development of the
Q18: The ectoderm forms which of the following?
A)
Q19: The division of the zygote into two
Q21: If the gonads fail to develop very
Q22: Which statement regarding placental circulation is true?
A)
Q23: During implantation,
A) the syncytial trophoblast erodes a
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