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How does the given below concepts differ...

How does the given below concepts differs?
(a) Bioaccumulation
(b) Biomagnification.

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(a) Bioaccumulation: the process of entry of pollutants into a food chain is known as bioaccumulation.
(b). Biomagnification: it is the tendency of pollutants to concentrate as they move from one tropic level to the next is known as biomagnification.
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