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The term "ecosystem" was first proposed by

A. A.G. Tansely

B. H.T. Odum

C. Karl Mobius

D. None of these

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  1. Soil particles are arranged in order of increasing size are
  2. Gas liberated in Bhopal gas tragedy was
  3. When compared to the trophic level above, the total energy present in any given trophic level is necessarily
  4. The source of energy in an ecosystem is
  5. The total set of feeding relationships in a biotic community is called
  6. Smog is a combination of
  7. The total interacting animals and plants in any well defined area which as field or a pond is known…
  8. The most polluted city in the world is
  9. Birth rate under ideal conditions is known as
  10. Pedology is the study of
  11. The whale is
  12. Animals in cold regions have fur because
  13. Synecology is the study of
  14. Desert animals are called
  15. In an ecosystem the population of
  16. The most widespread form of symbiosis in nature is
  17. Which is the correct sequence in a food-chain
  18. One always finds many more of the prey species than of the predator. This is called a
  19. Which of the following is normally not an important atmospheric pollutant
  20. All the living organisms on earth constitute
  21. An organism which lives at the expense of another organism is called
  22. Association of a sea-anemone with hermit crab living in a gastropod shell is an example of
  23. The soils transported by water are called
  24. Plants growing on sea shores show characters of
  25. When a big fish eats a small fish, which eats water fleas supported by phyto-plankton, the water-fleas…
  26. Animals which live at the bottom of the sea are called
  27. Ultra-violet radiation from sunlight causes the reaction that produce
  28. The first fish that eats upon the planktonic form is
  29. Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
  30. The transitional zone where two different types of communities meet is called the