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wills7 wills7
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10 years ago
3.  For the period from conception through implantation on the uterine wall, the developing human is called a ______.

A.  zygote
B.  embryo
C.  fetus
D.  teratogen


4.  In 2 to 8 weeks of age, when the heart begins beating, the developing human is called a ______.

A.  zygote
B.  embryo
C.  fetus
D.  teratogen
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padrepadre
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10 years ago
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