The _____________ becomes the digestive system,lungs,urinary tract,and glands.
A) mesoderm
B) chorion
C) endoderm
D) ectoderm
Correct Answer:
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Q6: An ovum bursts from one of a
Q12: The spot on the ovary from which
Q13: The amniotic fluid
A)delivers food and oxygen to
Q13: The male produces sperm in the _,
Q15: The period of the embryo lasts from
A)fertilization
Q16: Implantation occurs _ after fertilization.
A)within a few
Q18: Which of the following parts of a
Q19: At 3½ weeks after fertilization,production of neurons
Q21: An estimated _ percent of American women
Q22: Research suggests that more active fetuses during
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