Question
Biology Question on Environmental Issues
Biological Oxygen Demand (BOD) is a measure of
A
industrial wastes poured into water bodies
B
extent to which water is polluted with organic compounds
C
amount of carbon monoxide inseparably combined with haemoglobin
D
amount of oxygen needed by green plants during night.
Answer
extent to which water is polluted with organic compounds
Explanation
Solution
To measure water pollution, Biological Oxygen Demand or BOD test is done. In this test, amount of oxygen sufficient for degradation of waste organic matter by
microorganisms in a sample is measured. The more oxygen used up by the microorganism to degrade the organic matter in the sample, the greater the BOD would be