During the period of the __________, the baby is most vulnerable to threats from its environment.
A) zygote
B) embryo
C) fetus
D) All the alternatives are correct.
Correct Answer:
Verified
Q7: Implantation takes about
A) 24 hours.
B) 3 days.
C)
Q8: Emily has been trying to conceive for
Q9: The period of the zygote lasts about
A)
Q10: The period of the embryo begins
A) within
Q11: The period of the embryo lasts approximately
Q13: Louisa and her husband have conceived this
Q14: Which of the following developments occur during
Q15: Michelle, who will be giving birth soon,
Q16: All major internal and external structures form
Q17: The endodermal layer eventually forms
A) the nervous
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