Question

define oxygen cycle explain it​

Answer 1

Answer:

Definition of oxygen cycle. : the cycle whereby atmospheric oxygen is converted to carbon dioxide in animal respiration and regenerated by green plants in photosynthesis.

Answer 2

Explanation:

Oxygen cycle, along with the carbon cycle and nitrogen cycle plays an essential role in the existence of life on the earth. The oxygen cycle is a biological process which helps in maintaining the oxygen level by moving through three main spheres of the earth which are:

Atmosphere

Lithosphere

Biosphere...