Diffusion is the movement of particles from a region of concentration to the region of concentration.

lower

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same

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higher

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constant

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Solution

The correct options are
A lower
C higher
The process of diffusion includes the movement of particles (substances) from the region of higher to the region of lower concentration till concentration on both sides become equal.
The same process is responsible for the gaseous exchange that takes place betweeen the blood and the air in the alveoli.

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Q. Diffusion is the movement of particles from a region of concentration to the region of concentration.

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Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement of a separating membrane is called

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