Which of the following statement(s) is/are not correct regarding biomagnification? (a) Heavy meta...

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Which of the following statement(s) is/are not correct regarding biomagnification?
(a) Heavy metals and persistent pesticides pass into food chain and increases in amount per unit weight of organisms with the rise in trophic level due to their accumulation in fat
(b) Accumulation of zinc can cause thinning of eggshell in birds
(c) DDT accumulation is a major cause of killing of fish-eating birds
(d) Biomagnification occurs in all aquatic food chain

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