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Ayeaye Ayeaye
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9 years ago
The mass of cells that attaches itself to the wall of the uterus about two weeks after conception is called a(n) ________ and has about ________ cells.
a.   umbilical cord; 36
b.   placenta; 36
c.   blastocyst; 150
d.   autosome; 150
e.   chorion; 3
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The Developing Child

The Developing Child


Edition: 13th
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danielle2018danielle2018
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Ayeaye Author
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9 years ago
Answered perfectly Smiling Face with Open Mouth
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9 years ago
You are welcome.
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