Apentix/AP Environmental Science/Unit 8: Aquatic and Terrestrial Pollution/Question

AP Environmental Sciencemediummcq1 pt

Fecal coliform bacteria are used as an indicator of water quality because

A.their presence signals contamination by sewage

B.they are harmless in all water

C.they indicate high oxygen

D.they measure water temperature

Explanation

Core Concept

Coliforms live in intestines, so their detection flags fecal pollution and the pathogens that travel with it — a cheap early warning.

Correct Answer

Atheir presence signals contamination by sewage

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