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The most polluted city in the world is

A. Tokyo

B. New York

C. Calcutta

D. Mexico

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  1. Trophic levels are formed by
  2. Plants growing on sea shores show characters of
  3. An organism which lives at the expense of another organism is called
  4. A pond is
  5. Biome is
  6. A food-chain consists of
  7. An association between two or more species in which both are benefited is known as
  8. Which of the following is normally not an important atmospheric pollutant
  9. Birth rate under ideal conditions is known as
  10. Silent valley of Kerala is preserved because
  11. Synecology is the study of
  12. Which of the following is an anti-forest conservation activity ?
  13. Acid rain is
  14. Species that occur in different geographical regions separated by special barriers are
  15. The source of energy in an ecosystem is
  16. Desert animals are called
  17. In an ecosystem the population of
  18. Which one is the direct ecological factor ?
  19. When a big fish eats a small fish, which eats water fleas supported by phyto-plankton, the water-fleas…
  20. Some animals have a constant high body temperature. This is because
  21. The soils transported by water are called
  22. The energy storage of consumer level is called
  23. The total interacting animals and plants in any well defined area which as field or a pond is known…
  24. Trophic levels are formed by
  25. Animals in cold regions have fur because
  26. Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
  27. Which is the correct sequence in a food-chain
  28. When compared to the trophic level above, the total energy present in any given trophic level is necessarily
  29. The total set of feeding relationships in a biotic community is called
  30. The main cause of soil erosion in India is