CBSE Class 10 Science 2019 Outside Delhi Set 3

Question : 7

Total: 12

Define a food chain. Design a terrestrial food chain of four trophic levels. If a pollutant enters at the producer level, the organisms of which trophic level will have the maximum concentration of the pollutant in their bodies? What is this phenomenon called?

Solution:

It is the sequence of arrangement of living organism in a community in which one organism consumes another organism to transfer food energy.

Grass → Insect → Frog → Bird The organism at higher tropic level will have the maximum concentration of pollutants. This phenomenon is called biological magnification.

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