contestada

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

A.concentration
B.osmosis
C.membrane
D.diffusion

Respuesta :

articunojaz
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. 
alexchirskiy

concentration

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