Q5 of 163 Page 240

If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?

Cat will have the maximum concentration of harmful chemicals in its body because mice will feed on plants and cats feed on mice. The concentration of chemicals increases with increase in each trophic level.


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3

Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.

 4

In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemical be maximum?

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Which radiations are absorbed by ozone layer?

 7

Name the group of chemical compounds which damages the ozone layer.