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A.Ra 8749 b.Ra 9003 c.Ra 6969 d.Ra 166 146.It is a term used to describe the over-abundance in the growth of algae in water due to the presence of excess nutrients.A.Eutrophication b.Biodegradation c.Stabilization d.Decomposition 147.A type of microorganism used for mo nitoring the pathogenic property o f water.