Well, the COD determines/indicates the amount of oxygen which is needed for oxidation of all organic substances in water in mg/l or g/m^3.
Chemotrophs (Bacteria) are essential in the conversion of nitrogen containing compounds to nitrogen forms that are accessible and usable by plants.
Answer:
atmospheric pressure and winds (I’m pretty sure)
Frogs have webbed feet so they can swim faster and more effectively. The muscles <span>in their back legs are strong.</span>
