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Question
The maximum biological magnification of DDT through food web can be seen in
The maximum biological magnification of DDT through food web can be seen in
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Solution
The correct option is C Man
A few toxic substances, often present in industrial wastes, can undergo biological magnification (biomagnification) in the food chain. Biomagnification refers to increase in the concentration of the toxic chemical at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted and passed on to the next higher trophic level. This phenomenon is well-known for mercury and DDT. As man occupies the top most trophic level of all the food chains, man cannot pass the toxicant to any other organism. Thus, the correct answer is option D.
A few toxic substances, often present in industrial wastes, can undergo biological magnification (biomagnification) in the food chain.
Biomagnification refers to increase in the concentration of the toxic chemical at successive trophic levels.
This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted and passed on to the next higher trophic level. This phenomenon is well-known for mercury and DDT.
As man occupies the top most trophic level of all the food chains, man cannot pass the toxicant to any other organism. Thus, the correct answer is option D.
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