SSC Ecology And Environment Sample Paper NCERT Sample Paper-3

  • question_answer
    Which of the following organisms is used as an indicator of water quality?

    A)  Baggiota          

    B)  Chiorella

    C)  Azospirillum     

    D)  Escherichia

    Correct Answer: D

    Solution :

    [d] The number of bacteria as Escherichia coli in unit volume of water called 'Escherichia coli index' is taken as a parameter of water pollution. The presence of large number of E. coli shows the pollution level of water.

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