Answer:
Dissolved oxygen concentrations are constantly affected by diffusion and aeration, photosynthesis, respiration and decomposition. While water equilibrates toward 100% air saturation, dissolved oxygen levels will also fluctuate with temperature, salinity and pressure changes ³.
Relationship between oxygen uptake and dissolved oxygen concentration The potential for adverse effects of low DO concentrations on fish can be defined ...
Explanation:
the internal structures provide shapes and support to a variety of living organisms both unicellular and multicellular
They are composed of proteins. I cannot see the options but hopefully that answer is in one of them
