NEET2023BotanyEnvironmental IssuesActual
Which one of the following statements is NOT correct?
Options
- AThe amount of some toxic substances of industrial waste water increases in the organisms at successive trophic
- BThe micro-organisms involved in biodegradation of organic matter in a sewage polluted water body consume a lot
- CAlgal blooms caused by excess of organic matter in water improve water quality and promote fisheries.
- DWater hyacinth grows abundantly in eutrophic water bodies and leads to an imbalance in the ecosystem dynamics
Correct answer
C. Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries.
Step-by-step solution
During eutrophication of a water-body, there is continuous addition of sewage, organic waste which increases the BOD and subsequently decreases the DO. The addition of inorganic nutrients, like phosphate, causes extensive growth of algae, called algal bloom. This depleted the water quality and kills fish.