The ultimate source of nitrogen is

  • A
    Atmospheric nitrogen
  • B
    Nitrogen present in soil
  • C
    Nitrogen that comes from water
  • D
    Nitrogen fixed by the process of photosynthesis

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Similar Questions

Match the following:
Column-$I$Column-$II$
$(a)$ Free living aerobic nitrogen fixer$(1)$ Frankia
$(b)$ Denitrification$(2)$ Anabaena
$(c)$ Free living anaerobic nitrogen fixer$(3)$ Thiobacillus
$(d)$ Symbionts$(4)$ Beijerinckia

Fishing and Guano birds assist the cycling of

The conversion of ammonia into nitrites and nitrates is called

Which of the following is a limiting nutrient for both natural and agricultural ecosystems?

Nitrifying bacteria:

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