Question

Dissolved oxygen in water comes
a) Photosynthesis of aquatic plants
b) Diffusion of atmospheric oxygen
c) Oxidation
d) Both a & b.​

Answer 1

Answer:

d)both a and b according to me

Answer 2

Answer:

b) Diffusion of atmospheric oxygen

Explanation:

A small amount of oxygen, up to about ten molecules of oxygen per million of water, is actually dissolved in water. Oxygen enters a stream mainly from the atmosphere and, in areas where groundwater discharge into streams is a large portion of streamflow, from groundwater discharge.

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