Multiple choice

Escherichia coli is found in:

  1. air

  2. water

  3. soil

  4. human intestine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Escherichia coli (E. coli) is a bacterium that naturally inhabits the human intestinal tract as part of the normal gut microbiota. While it can be found in water and soil due to fecal contamination, its primary habitat is the human intestine where it aids in digestion and vitamin K production.

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