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Dichloro diphenyl Trichloroethane.
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VGS PUBLICATION-BRILLIANT-OUR ENVIRONMENT-OUR CONCERN-PREPARATION QUESTIONS FOR THE EXAMINATION PURPOSE
  1. What does the pyramid of biomass represent?

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  2. What does a pyramid of energy represent?

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  3. Expand D.D.T.

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  4. Expand B.H.C.

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  5. Give an example for chemical pesticides.

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  6. Give one example for "perrfect pesticide".

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  7. What do you call the tendency of pollutants to concentrate as they mor...

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  8. name 'the process of entering of pollutants in a food chain'.

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  9. What do you call the substance meant for preventing, destroying or mit...

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  10. The functional role of an of organism in a community is called as?

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  11. The elaborate interconnected feeding relationships in an ecosystem is ...

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  12. Name the pathway along which food is transferred from tropic level to ...

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  13. What occupies the base of any ecological pyramid?

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  14. Any food chain in an ecosystem starts from?

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  15. What is the source of energy for all ecosystems?

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  16. Guess the reason for the growth of mosquito population.

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  17. Which ecological pyramid in an aquatic ecosystem is inverted?

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  18. Name the disease that occurs due to increase of fluorine contents in d...

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  19. The cruel campaign against which bird is initiated in 1958 in china?

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  20. What are the producers in any ecosystem?

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