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Anna [14]
3 years ago
13

What is the attraction that holds two covalently bonded atoms together

Biology
1 answer:
frutty [35]3 years ago
7 0
The attraction that holds two covalently bonded atoms together is called covalent bond
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Complex barrier to the flow of substances out of the cells,and restrictions to inflow of unwanted substances into the cells. The hydrophobic and hydrophilic nature of the cell membrane controls the entry of substances from the extracellular medium into the intracellualr. In addition the polarity restricts certain substance movement across the walls.

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