Question

What is the difference between diffusion and osmosis.

Answer 1

diffusion is movement of substances or gases from higher concentration to lower concentration.
osmosis is the movement of water molecules through semi - permeable membrane from high concentration to lower concentration. 

Answer 2

NCERT based Answer for Class 11 Biology Students

Diffusion

 Movement of all types of substances from higher concentration to lower concentration.

 Diffusion is applicable to solid, liquid or gases.

 It does not require semi permeable membrane.

 Turgor pressure does not operate in diffusion.

 Diffusion of a substance is independent of other substances present in media.

Osmosis

 Movement of only water from higher water potential to lower water potential.

 Osmosis is applicable to water only.

 Osmosis occurs through semi permeable membrane.

 Turgor pressure opposes osmosis.

 Osmosis depends on amount of solute dissolved in media.

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