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  • THE CELL AND ITS ENVIRONMENT
    BIOLOGY

    THE CELL AND ITS ENVIRONMENT

    DIFFUSION Diffusion is defined as the process by which molecules or ions of a substance (i.e. gases and liquids) move from a region of high concentration to a region of low concentration until they are evenly distributed. The substance involved in diffusion may be liquid, gases or solid.   Factors Affecting or Controlling Diffusion The rate or speed of diffusion is controlled by a number of factors which include: State of matter: Diffusion varies with the three state of matter. The diffusion of gases is much faster than that of liquids because the gas molecules are freer and therefore faster than liquid molecules. Molecular size: The nature or the size…

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