Multiple choice

Presence of _________ is an indicator of water pollution.

  1. E. coli

  2. Chlorella

  3. Beggiatoa

  4. Ulothrix

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

E. coli is a coliform bacterium commonly found in the intestines of humans and animals. Its presence in water is a standard indicator of fecal contamination and potential water pollution.