Biology: The Dynamics of Life, California Edition

Section 2: Development Before Birth

Development Before Birth

1.
Which of these vitamins has been found to reduce the incidence of neural tube defects in human babies?
A)vitamin K
B)vitamin C
C)pantothenic acid
D)folic acid
2.
Which of these is the name for human embryonic development?
A)a navel
B)a placenta
C)a contraction
D)a blastocyst
3.
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This chart shows the growth rate of a fetus. During which period is the fetus' growth the greatest?
A)from 3 weeks to 6 weeks
B)from 7 months to 9 months
C)from 4 months to 6 months
D)from 8 weeks to 3 months
4.
__________ keeps the embryo attached to the wall of the uterus.
A)The blastula
B)The fallopian tube
C)The umbilical cord
D)The vagina
5.
At what point in development does an embryo become a fetus?
A)by the nineteenth week
B)by the eighth week
C)by the thirty-ninth week
D)by the twenty-eighth week
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