1. Ammonification is release of ammonia from amino acids during the decomposition of proteins.

    Ammonification is release of ammonia from amino acids during the decomposition of
    proteins.

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  2. Conversion of inert elemental nitrogen gas into biologically usable form is called nitrogen fixation.

    Conversion of inert elemental nitrogen gas into biologically usable form is called nitrogen fixation.

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  3. Water cycle or Hydrological cycle is repeated circulation of water among various components of the biosphere involving evaporation of water more from the sea and falling (precipitating) more on land and flowing back into the sea by rivers.

    Water cycle or Hydrological cycle is repeated circulation of water among various components of the biosphere involving evaporation of water more from the sea and falling (precipitating) more on land and flowing back into the sea by rivers.

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  4. Marine organisms receive continuous supply of nutrients by rivers which bring the same from rocks and soils over which water flows.

    Marine organisms receive continuous supply of nutrients by rivers which bring the same from rocks and soils over which water flows.

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