Question

The increased concentration of harmful toxins in successive trophic levels is called

• A. Biological magnification
• B. Greenhouse effect
• C. Acid precipitation
• D. Eutrophication
• E. Ozone depletion

Answer 1

The correct option is A Biological magnification

A. Biological magnification is the process by which heavy metals and pesticides become more concentrated at higher trophic levels of the food chain.

B. The greenhouse effect is the phenomenon of keeping the earth warm due to the presence of certain gases in the atmosphere.

C. Acid precipitation is a kind of precipitation of any form of rain, hail, fog, snow that has acidic pollutants especially sulphuric acid and nitric acid.

D. Eutrophication is the natural state in many lakes and ponds which have a rich supply of nutrients and this leads to decomposition of nutrients through the bacteria and by the process of anaerobic respiration.

E. Ozone depletion is the reduction in the amount of ozone or degradation of ozone in the stratosphere region of earth's atmosphere due to certain ozone-depleting substances such as CFCs or Chlorofluorocarbons.

Hence the increased concentration of harmful toxins in successive trophic levels is called biological magnification.

So, the correct answer is 'Biological magnification'.