Question

State the biological importance of the presence of dissolved oxygen and carbon dioxide in river water

Answer 1

the biological importance of the presence of dissolved Oxygen and Carbon dioxide in river water is that the aquatic life can use the oxygen from the water for their respiration and exhail the carbon dioxide which goes into the water.

Answer 2

Carbon dioxide, also called CO2, is found in water as a dissolved gas. It can dissolve in water 200 times more easily than oxygen. Aquatic plants depend on carbon dioxide for life and growth, just as fish depend on oxygen.