nneke
nneke nneke
  • 19-04-2017
  • Biology
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why a molecule may not be to pass into or out of a cell

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guesst555
guesst555 guesst555
  • 19-04-2017
All cells have selectively permeable membranes, which means that they let important molecules inside the cell while leaving other ones outside. Important molecules go inside the cell by the process of diffusion or osmosis. 
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