The allantois
A) is the first site of blood cell formation.
B) is the fetal half of the placenta.
C) becomes the umbilical cord vessels.
D) cushions and protects the embryo with fluid.
Correct Answer:
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Q20: The zygote receives cytoplasm,organelles,nutrients,and structural components from
Q21: The outer ring of cells of the
Q22: The embryo will develop from the _
Q23: An ectopic pregnancy that survives until term
Q24: The pre-embryonic structure that enters the uterus
Q26: The process of gastrulation ends with the
Q27: From which primary germ layer does the
Q28: Which is the last stage in pre-embryonic
Q29: Which of the following is NOT a
Q30: The yolk sac
A)is the first site of
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