Species that occur in different geographical regions separated by special barriers are

A. Allopatric

B. Autogenic

C. Sympatric

D. Allogenic

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  1. Bio tic factors are
  2. Gas liberated in Bhopal gas tragedy was
  3. In an ecosystem the population of
  4. When compared to the trophic level above, the total energy present in any given trophic level is necessarily
  5. Association of a sea-anemone with hermit crab living in a gastropod shell is an example of
  6. The whale is
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  8. An organism which lives at the expense of another organism is called
  9. Synecology is the study of
  10. The term "ecosystem" was first proposed by
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  17. Desert animals are called
  18. Strontium- 90 can cause
  19. The first fish that eats upon the planktonic form is
  20. Ultra-violet radiation from sunlight causes the reaction that produce
  21. Trophic levels are formed by
  22. Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
  23. The total interacting animals and plants in any well defined area which as field or a pond is known…
  24. Some animals have a constant high body temperature. This is because
  25. Which of the following is an anti-forest conservation activity ?
  26. Acid rain is
  27. Biological equilibrium is equilibrium among the
  28. When a big fish eats a small fish, which eats water fleas supported by phyto-plankton, the water-fleas…
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