Question
Draw a labelled diagram to show the oxygen cycle in nature.
Or
Draw a neat labelled diagram to show the oxygen cycle in nature.
Or
Describe oxygen cycle in nature.
Solution
Oxygen cycle. Oxygen in gaseous form is present in atmosphere (21 per cent).
In water bodies, it is present in dissolved form. From these sources, plants, animals and decomposers take molecular O2 for respiration.
Burning of fuels such as coal, wood, petroleum also use atmospheric O2.
Green plants utilize CO2 and H2O during photosynthesis and release molecular O2 in air and water.
