First slide

Water Pollution and its Control

Question

Paraquat is an effective herbicide, but is banned in many countries because it is found to accumulate in higher concentrations at successive trophic levels. This biological phenomenon is termed

Moderate

A

biofortification.
B

biomagnification.
C

biodegradation.
D

bioremediation.

Solution

Long-term exposure of Paraquat results in harmful biomagnification in humans and mammals. Extensive paraquat applications lead to widespread residues in soil surface and aquatic environments that ultimately enter the food chain. Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.

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