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Home Q & A Board Biology-Related Homework Help General Biology
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Stookie Stookie
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11 years ago
Match each other developmental stages numbered above with the time period in which it occurs in normal development, as given.

1st stage: _____________
2nd stage: _____________
3rd stage: _____________
4th stage: _____________

a.) Fetus has a beating heart
b.) Embryo differentiates into three layers (gastrulalation)
c.) Blastocyst implants in endometrium
d.) cleavage (mitosis) leads to a large number of cells
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#1
11 years ago Edited: 11 years ago, monroe025
I think it might be this:
1st = D
2nd = C
3rd = B
4th =  A

But let me double check for you. I'm actually in a class right now  Wink Face

ETA: According to the attached notes on Human Development, I believe the order I provided you with is correct! Hope this helps!
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