A pollutant is any substance, chemical or other factor that changes

A. natural geochemical cycles

B. the natural flora of a place

C. the natural wild life of a region

D. the natural balance of our environment

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  1. When young plants are grazed too heavily they get killed because
  2. An area of soil is thoroughly wetted and allowed to drain until capillary movement of water is stopped.…
  3. Hie sequence blue green algae > crustose lichens foliose lichens > mosses shrubs dicotyledonous…
  4. Biologists celebrate 5th June as
  5.   Which of the following is normally not at atmospheric pollutant
  6. Correct definition of ecosystem is :
  7. Which is the correct food chain
  8. What will happen if our water resources are continued to be polluted by industrial wastes
  9. In grassland ecosystem the pyramid of energy is
  10. Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
  11. The first stage of plant succession on earth is called
  12. Autumn colouration of leaves appears only in
  13. In cities like Mumbai and Delhi, the major air pollutants are
  14. Hie earliest settlers on barren lands are generally
  15. Commensalism is
  16. Pedology is the study of
  17. A habitat of long severe winters and growing season limited to a few months of summer constitutes
  18. A pollutant is any substance, chemical or other factor that changes
  19. Water plants usually have
  20. Primary treatment of sewage means
  21. The source of energy in the ecosystem is:
  22. Competition for food, light and space is most severe in
  23. Soil particles arranged in order of increasing size are
  24. Which one of the following is associated with the conservation of forest ?
  25. Radiation is a health hazard as it causes
  26. Silent valley is situated in
  27. An American plant which had become a troublesome weed in India is
  28. What is the major constituent of biomass of an organism
  29. One of these is a renewable source of energy:
  30. Humus is an example of