NEET 2023
- Exam
- NEET
- Year
- 2023
- Subject
- Botany
- Chapter
- Environmental Issues
NEET 2023 · Botany · Environmental Issues
Which one of the following statements is NOT correct?
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 levels.
- BThe micro-organisms involved in biodegradation of organic matter in a sewage polluted water body consume a lot of oxygen causing the death of aquatic organisms.
- 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 of the water body.
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.