Multiple choice

BOD is increased by:

  1. algae

  2. moss

  3. fern

  4. distillated wastes

  5. none of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Algae increase BOD (Biochemical Oxygen Demand) in water bodies. When algal blooms die and decompose, bacteria consume significant amounts of oxygen during the decomposition process, leading to higher BOD values that can harm aquatic ecosystems.