UPSC Previous Year Question | Prelims GS | 2017

Biological Oxygen Demand (BOD) is a standard criterion for

  1. Measuring oxygen levels in blood
  2. Computing oxygen levels in forest ecosystems
  3. Pollution assay in aquatic ecosystems
  4. Assessing oxygen levels in high altitude regions

Answer

Correct Answer

Pollution assay in aquatic ecosystems

Explanation

BOD measures the amount of dissolved oxygen consumed by microorganisms to decompose organic matter in water, serving as a standard indicator of organic pollution levels in aquatic ecosystems.

Topics: biological oxygen demand, environment and ecology, geography, water quality parameters