Differentiation of cells begins
A) during the period of the embryo.
B) during the period of the fetus.
C) during the period of the zygote.
D) at birth.
Correct Answer:
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Q1: The period of the embryo goes from
Q3: Your sister is pregnant and wonders how
Q4: Most of the body structures and internal
Q5: Which of the following events does not
Q6: Three layers called the ectoderm, mesoderm, and
Q7: Once implantation is complete, the developing organism
Q8: A fertilized egg is called a(n)
A) amnion.
B)
Q9: The _ is where nutrients and wastes
Q10: Amy doesn't know it yet, but she
Q11: Implantation of the fertilized egg into the
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