Oxygen is returned to the atmosphere mainly by:

  • A
    Photosynthesis
  • B
    Respiration
  • C
    Burning of fossil fuel
  • D
    Fungi

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Similar Questions

The nitrogen molecules present in air can be converted into nitrates and nitrites by:

State whether the following statement is True or False:
Nitrogen gas makes up $78 \%$ of our atmosphere and nitrogen is also a part of many molecules essential to life like proteins,nucleic acids ($DNA$ and $RNA$) and some vitamins.

Write the names of two biologically important compounds that contain both nitrogen and oxygen.

Give two examples of decomposers.

One of the following processes is not a step involved in the water cycle operating in nature:

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