Question 59
AOptions
BSolution
Biological Oxygen Demand (BOD) is a standard criterion used to measure the amount of dissolved oxygen consumed by microorganisms (like bacteria) while decomposing organic matter in water. A higher BOD value indicates a greater amount of organic pollution in the water, as more oxygen is being consumed by the decomposers. Therefore, it is a key indicator for assessing the level of organic pollution in aquatic ecosystems, particularly to determine water quality and the effectiveness of wastewater treatment.
CStrategy
For environment and ecology questions, understand the definitions and applications of key terms and indicators. BOD is a fundamental concept in water pollution assessment, and its direct relevance to aquatic ecosystems should be clearly understood.
DSyllabus Analysis
This question is from Environment and Ecology, specifically environmental pollution and its indicators in aquatic environments.
EQuestion Analysis
Easy. BOD is a very common concept in environmental science.