Question

is the amount of dissolved oxygen needed by organisms present in water bodies to digest the organic nutrients present in it.

• A. COD
• B. LOD
• C. BOD
• D. MOD

Answer 1

The correct option is C BOD

Biological Oxygen Demand or Biochemical Oxygen Demand is the amount of dissolved oxygen needed by organisms present in water bodies to digest the organic nutrients present in it. When the amount of organic nutrients in water increases, the microorganisms that break them down also increase. This increases the BOD and thus lesser oxygen is available for other organisms to breathe.