Q. Common indicator organism of water pollution is
A) $Lemna\ pancicostata$
B) $Eichhornia\ crassipes$
C) $Escherichia\ coli$
D) $Entamoeba\ histolytica$
Explanation
Since, large populations of Escherichia coli are found in human colon, the presence of E. coli in water indicates that, it has been contaminated with faecal matter. Thus, E. coli is commonly known as indicator of water pollution.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.