Question

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EXPLAIN BIOLOGICAL MAGNIFICATION........​

Answer 1

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Biomagnification is defined as the accumulation of a particular substance in the body of the organisms at different trophic levels of a food chain. One example of biomagnification is the accumulation of insecticide DDT which gets accumulated in zooplanktons. Small fishes consume these zooplanktons. Small fishes are consumed by large fish which are finally consumed by fish-eating bird present at the highest position in tropic level. Hence, the organism at the highest trophic level has the maximum accumulation of toxic substances.

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Answer 2

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Biomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.

This increase can occur as a result of:

• Persistence – where the substance cannot be broken down by environmental processes
• Food chain energetics – where the substance's concentration increases progressively as it moves up a food chain
• Low or non-existent rate of internal degradation or excretion of the substance – mainly due to water-insolubility

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