Respuesta :

Diffusion is a process that occurs when a substance such as water, molecules, and ions, which are usually needed for various cellular processes, enter and leave cells. The way that cell diffusion happens is by molecules moving from an area of high concentration to an area of low concentration.

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Tallon
Diffusion is a process when a substance such as water, molecule, and ions, which are usually needed for various cellular process, enters and leaves cells.