Correct definition of ecosystem is :

A. A community of organisms interacting with one another

B. The abiotic component of a habitat

C. The part of the earth and its atmosphere which inhabits living organisms

D. The community of organisms together with environment in which they live

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  1. Smog is a common pollutant in places having
  2. Laterization is a process which results in the
  3. An area of soil is thoroughly wetted and allowed to drain until capillary movement of water is stopped.…
  4. Mark which is true
  5. Primary treatment of sewage means
  6. In cities like Mumbai and Delhi, the major air pollutants are
  7. An American plant which had become a troublesome weed in India is
  8.   Which of the following is normally not at atmospheric pollutant
  9. The nitrifying bacteria which oxidise nitrite to nitrates include
  10. What is the major constituent of biomass of an organism
  11. Radiation is a health hazard as it causes
  12. Desert plants are generally
  13. Humus is an example of
  14. In grassland ecosystem the pyramid of energy is
  15. The source of energy in the ecosystem is:
  16. The best indicator of SO^2 pollution is
  17. Hie sequence blue green algae > crustose lichens foliose lichens > mosses shrubs dicotyledonous…
  18. Increasing accumulation of DDT in organisms of a food chain in higher trophic levels is known as
  19. Which is the correct food chain
  20. A pollutant is any substance, chemical or other factor that changes
  21. The first stage of plant succession on earth is called
  22. Commensalism is
  23. When young plants are grazed too heavily they get killed because
  24. Correct definition of ecosystem is :
  25. Carbon cycle includes
  26. What will happen if our water resources are continued to be polluted by industrial wastes
  27. Tropical evergreen forests are seen in
  28. . Biome is
  29. Soil particles arranged in order of increasing size are
  30. The least porous soil among the following is