IGCSE O Level Biology Online Tests
Pollution BOD and Eutrophication MCQ (Multiple Choice Questions) PDF Download
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Pollution BOD and Eutrophication MCQ (PDF) Questions Answers Download
The higher the BOD, the
- lower the water pollution
- lesser the bacteria in it
- more the water pollution
- the more the air pollution
Narrow tolerance of oxygen (O2) is found in
- humans
- plants
- mammals
- fish
BOD measures the amount of
- bacteria in a given sample of water
- algae being decomposed in a given sample
- oxygen bacteria need to decompose organic matter in a given sample
- oxygen bacteria need to decompose organic matter in a given sample in a fixed period of time
The word BOD refers to the
- Bidding of Dermatology
- Binding of Dirt
- Biochemical occupied Date
- Biochemical Oxygen demand
Fish die as a result of water pollution due to
- less BOD
- more tolerance range for oxygen
- narrow tolerance range for oxygen
- zero tolerance range for oxygen
IGCSE O Level Biology Practice Tests
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