Question

Which of the following organisms found in human waste cause water pollution?

• A. Coliform bacteria
• B. Viruses
• C. Protozoa
• D. Parasitic worms

Hint:

Presence of \textbf{coliform bacteria} in water is a key indicator of \textbf{fecal pollution}.

Answer 1

The Correct Option is A

Step 1: Human waste contains a variety of microorganisms, some of which are used as indicators of water pollution.
Step 2: Coliform bacteria (e.g., \textit{Escherichia coli}) are commonly present in the intestines of humans and other warm-blooded animals.
Step 3: Their presence in water indicates fecal contamination and possible presence of pathogenic organisms.
Step 4: Hence, coliform bacteria are widely used as a standard indicator organism for assessing water pollution due to human waste.