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77julia77 [94]
3 years ago
13

Diffusion, movement of particles across a membrane is driven by differences in

Biology
1 answer:
stepan [7]3 years ago
3 0
A concentration.

In cells, there are two types of transportation of needed organic compounds. The active and passive transport.
The active transport requires energy or ATP while passive doesn't. Further, diffusion, a passive transport transfers compounds from higher to lower concentrations. 
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