Q3 of 16 Page 264

Which of the following are environment- friendly practices?

All of the three activities a, b and c are environment friendly. Carrying cloth bags and not plastic bags is environment friendly because plastic is non-biodegradable and causes pollution after it has been discarded, whereas cloth is degradable and also it lasts longer than plastic.

More from this chapter

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1

Which of the following groups contain only biodegradable items?

(a) Grass, flowers and leather


(b) Grass, wood and plastic


(c) Fruit peels, cake and lime juice


(d) Cake, wood and grass

 2

Which of the following constitute a food chain?

 4

What will happen if we kill all the organisms in one trophic level?

 5

Will the impact of removing all the organisms in a trophic level be different for different trophic levels?

Can the organisms of any trophic level be removed without causing any damage to the ecosystem?