Q.1
Gas that makes upof our atmosphere.
  • Oxygen
  • Nitrogen
  • Hydrogen
  • Carbon Dioxide
Q.2
Plants absorb...
  • nitrates
  • nitrogen fixing bacteria
  • animals
  • decomposers
Q.3
The process that convert nitrates (NO3-) back to nitrogen gas (Nthere by replenishing N2 in the atmosphere is called
  • Nitrogen fixation
  • Deamination
  • Denitrification
  • Nitrification
Q.4
The conversion of Ammonia (NHto nitrite (NO2-) and then to nitrates (NO3-) is called
  • ammonification
  • Nitrification
  • Denitrification
  • Assimilation
Q.5
Ammonification is the process of
  • Formation of ammonia from nitrogen by nitrogen fixers
  • Formation of ammonia from amino acids by decomposers
  • Formation of ammonia from nitrates by nitrogen fixers
  • Formation of ammonia from nitrates by decomposers and bacteria in the soil
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