Question :Define diffusion. Give one example of it in a living system.

1.	Question :Define diffusion. Give one example of it in a living system.
Answer» Solution :It is TRANSPORT of materials from higher concentration to LOWER concentration DUE to intrinsic KINETIC energy of the molecules e.g. EXCHANGE of `O_2` of air and `CO_2` of blood at the lung alveoli.

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