Question

Which of the following organism is an example of polluted water indicator?

• A. $Daphnia$
• B. Trout fish
• C. $E.coli$
• D. Lichens

Answer 1

The correct option is C $E.coli$

Water pollution is the major cause of several chronic diseases. The potable water must be treated to get rid of certain harmful microorganism. Daphnia, trout fishes, lichens, and larvae of stone flies are the examples of fresh water indicator. While Tubifex and $E.Coli$ are polluted water indicators.