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Increasing accumulation of DDT in organisms of a food chain in higher trophic levels is known as

A. biotic potential

B. biotic component

C. biological value

D. biological amplification

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  1. What will happen if our water resources are continued to be polluted by industrial wastes
  2. Commensalism is
  3. Mark which is true
  4. Carbon cycle includes
  5. Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
  6. First link in any food chain is green plant because
  7. Water plants usually have
  8. Which one of the following is associated with the conservation of forest ?
  9. A pollutant is any substance, chemical or other factor that changes
  10. Smog is a common pollutant in places having
  11. Primary treatment of sewage means
  12. Laterization is a process which results in the
  13. Silent valley is situated in
  14. When young plants are grazed too heavily they get killed because
  15. The least porous soil among the following is
  16. An American plant which had become a troublesome weed in India is
  17. Desert plants are generally
  18. Pedology is the study of
  19. Soil particles arranged in order of increasing size are
  20. The nitrifying bacteria which oxidise nitrite to nitrates include
  21. Vegetation in Delhi is predominantly
  22. Biologists celebrate 5th June as
  23. The food chain in which microorganisms break down the energy-rich compounds synthesized by producers…
  24. The ultimate source of energy for fish is
  25. Increasing accumulation of DDT in organisms of a food chain in higher trophic levels is known as
  26.   Which of the following is normally not at atmospheric pollutant
  27. In grassland ecosystem the pyramid of energy is
  28. What is the major constituent of biomass of an organism
  29. The biggest herbarium of India is
  30. Deforestation may reduce the chances of