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Sahara Desert was formed over a period o...

Sahara Desert was formed over a period of time due to one of the following uncontrolled activities of man :

A

excessive cutting down of forest plants and trees

B

excessive killing of large herbivores

C

excessive killing of large carnivores

D

excessive use of poisonous chemicals called herbicidcs

Text Solution

Verified by Experts

The correct Answer is:
C
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LAKHMIR SINGH & MANJIT KAUR-OUR ENVIRONMENT-Exercise
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  2. In the food chain comprising of a snake, grass, insect, and frog, the ...

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  3. Sahara Desert was formed over a period of time due to one of the follo...

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  4. The sea water contains water beetles, tadpole, fish and weeds. (a) W...

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  5. The following is a food chain that ends with human : plants to bee t...

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  6. A food chain occurring in the sea which provides food for many people ...

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  7. What would happen to the number of rabbits and grass plants if the num...

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  8. What would happen to the number of grass plants and foxes if the numbe...

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  9. (a) Match the terms given in column I with the terms given in column I...

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  10. What percentage of the solar energy is trapped and utilised by the pla...

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  11. What percentage of energy available at the producer level is transferr...

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  12. Name the process in which a harmful chemical enters the food chain and...

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  13. In a food chain consisting of grass, frog, bird and insects, where wil...

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  14. If a harfmul chemical enters a food chain comprising cat, mice and pla...

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  15. Which radiations are absorbed by ozone layer ?

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  16. Name the man made component which is responsible for the depletion of ...

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  17. Name two waste materials which can be recycled.

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  18. Name the process by which the volume of solid wastes can be reduced.

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  19. If 5 joules of energy is available at producer level (plants), then ho...

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  20. State whether the following statement is true or false : Only 10 per...

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