If pregnancy does not occur,the corpus luteum shrinks,and the __________.
A) cells begin to duplicate
B) one-celled zygote multiplies and forms a blastocyst
C) germinal period lasts only about two weeks
D) lining of the uterus is discarded
Correct Answer:
Verified
Q2: The ectoderm becomes the _.
A) muscles and
Q3: When the blastocyst burrows deep into the
Q4: Which statement about a blastocyst is true?
A)
Q5: The embryonic disk _.
A) becomes the new
Q6: An ovum bursts from one of a
Q7: The most rapid prenatal changes take place
Q8: The placenta _.
A) forms in the second
Q9: The force of blood flowing through the
Q10: The yolk sac _.
A) forms during the
Q11: The amniotic fluid _.
A) delivers food and
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