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Diffusion is one type of passive transport. In Diffusion, molecules move from a higher concentration gradient to a lower concentration gradient. Diffustion does NOT need energy, or ATP.
Q: What is the DEFINITION of DIFFUSION?

A: Diffusion- a type of passive transport in cells in which molecules move from areas where there are more of them to areas there are fewer of them.

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Q: What is the definition for diffusion?
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