Which of the following does not occur during the first trimester?
A) cleavage
B) implantation
C) separation of blastomeres to form monozygotic twins
D) gastrulation
E) organs become functional
Correct Answer:
Verified
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Q43: The embryonic heart starts beating as blood
Q44: The hormone that increases the flexibility of
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Q47: By the end of gestation,which of the
Q48: The period of gestation that is characterized
Q49: The first stage of labor is the
Q50: Q51: 
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