A fetus is likely to yawn,curl its toes,and blink approximately _____ weeks after conception.
A) 3
B) 4
C) 5
D) 6
Correct Answer:
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Q16: Which of the following is not one
Q17: Implantation of a zygote in the uterine
Q18: The zygote has _ of chromosomes.
A)13 pairs
B)23
Q19: Because they have been unable to conceive
Q20: From about 8-40 weeks after conception,we refer
Q22: At about 6 months after conception,fetuses tend
Q23: Research on temperament has shown that
A)it is
Q24: Sex differentiation begins
A)at conception.
B)after the first week
Q25: _ occurs when an embryo has only
Q26: In the absence of specific hormonal signals,embryos
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