Which of the following structures is the last to appear?
A) ectoderm
B) endoderm
C) mesoderm
D) trophoblast
Correct Answer:
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Q29: The germinal period of prenatal development ends
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Q31: The first organized responses of the developing
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Q33: The structure that surrounds the developing organism,
Q35: The embryonic period lasts for approximately _
Q36: The placenta acts as a(n):
A) barrier and
Q37: The cephalocaudal pattern of development refers to
Q38: The umbilical cord is filled with a
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