PhoCa8ngDihfm7i PhoCa8ngDihfm7i
  • 01-11-2016
  • Spanish
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All multicellular organisms begin as a single cell. Within four or five days, that first cell multiplies into a ball-like structure of about 100 cells. What is this structure called?

A. Blastocyst
B. Heart
C. Placenta
D. Blood

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TooNashty
TooNashty TooNashty
  • 01-11-2016
That structure is called an A. Blastocyst
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