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lesley lesley
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6 years ago
The critical period of vulnerability is a period of time during which an embryo or fetus is vulnerable/to the effects of
 
  A) teratogens.
  B) estrogen.
  C) bacteria.
  D) illness.
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wns2395wns2395
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6 years ago
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lesley Author
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6 years ago
this is exactly what I needed
branbran2k16
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Yesterday
This calls for a celebration Person Raising Both Hands in Celebration
ouasfoudgewu
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2 hours ago
Thanks
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