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Vikki [24]
3 years ago
11

When there are different amounts of a substance on either side of the cell membrane, a(n) _____ gradient results.

Biology
2 answers:
marishachu [46]3 years ago
6 0
It is known as a concentration gradient which in diffusion will always flow from ares of high concentration to areas of low concentrations 

So i believe the answer to this is A. 
viva [34]3 years ago
4 0

concentration

A concentration gradient is the difference in the concentration of a substance across a distance.

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