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Home Q & A Board Biology-Related Homework Help General Biology
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reubank reubank
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6 years ago
The first embryonic blood cells come from
 
  a. the amnion.
  b. the inner cell mass of the blastocyst.
  c. the yolk sac.
  d. the chorion.
  e. the placenta

Question 2

The embryo develops from cells of the
 
  a. blastocyst outer layers.
  b. blastocyst inner cell mass.
  c. gastrula mesoderm.
  d. gastrula ectoderm.
  e. gastrula endoderm
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DuhitzlitzyDuhitzlitzy
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6 years ago
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reubank Author
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#2
6 years ago
Makes more sense now, TY
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