Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 5 - No. 35)
Which of the following is the best description of a concentration gradient?
The difference in concentration of a substance across a space.
The amount of a substance present in a solution.
The movement of a substance across a semi-permeable membrane.
The pressure exerted by a solute.
Explanation
A concentration gradient refers to the difference in the concentration of a substance in two separate areas.
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