Railways General Science & Technology Ecology and Environment Sample Paper Ecology & Environment Awareness Sample Test Paper-35

  • question_answer
    The most common indicator organism that represents polluted water is

    A)  E. coli 

    B)  Pseudomonas

    C)  Chlorella          

    D)  Entamoeba

    Correct Answer: A

    Solution :

    [a]  E. coli lives in the human intestine. If they are present in water it indicates that the water is polluted. E.coli coliform count test is done.

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