Environmental Issues. — Bio Zoology STD 12 — Question
Tamilnadu BoardEnglish MediumSTD 12Bio ZoologyEnvironmental Issues.3 Marks
Question
Comment on Bio-magnification of DDT.
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Answer
When non-degradable substances enter the food chain, they do not get metabolized or broken down or expelled and instead get transferred up the tropic levels of the food chain. During this process, they show an increase in concentration which is referred to as biomagnification. This results in increased toxicity and may even be lethal. This phenomenon is well established for mercury and DDT.
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