Multiple Choice
The period of the embryo begins at _____ and ends with _____, which takes about _____.
A) conception; birth; nine months
B) the first trimester; implantation into the uterine wall; twelve weeks
C) week 3; formation of bone cells; six weeks
D) organogenesis; ossification; one trimester
Correct Answer:

Verified
Correct Answer:
Verified
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