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  4. DDT residues are rapidly passed through food chain causing biomagnification because DDT is

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Q. $DDT$ residues are rapidly passed through food chain causing biomagnification because $DDT$ is

Haryana PMTHaryana PMT 2010

Solution:

Many of pesticides, such as DDT, aldrin and dieldrin are fat soluble and generally non- biodegradable. In the food chain, because of their build up, they get magnified in the higher trophic levels called biological magnification. The phenomenon of biological magnification is also reported of certain other pollutants such as, heavy metals, eg, mercury, copper and radioactive substances as strontium-$90$.