Question

Which one of the following statements is NOT correct?

• A. Algal blooms caused by excess of organic matter in water in water improve water quality and promote fisheries
• B. Water hyacinth grows abundantly in eutrophic water bodies and leads to an imbalance in the ecosystem dynamics of the water body
• C. The amount of some toxic substances of industrial waste water increases the organisms at successive trophic levels
• D. The micro-organisms involved in the biodegradation of organic matter in a sewage polluted water body consume a lot of oxygen causing the death of aquatic organisims

Answer 1

The Correct Option is A

Algal blooms caused by excess organic matter can lead to water quality degradation rather than improvement. These blooms can result in reduced oxygen levels in the water due to decomposition of the excess organic matter, potentially leading to fish kills and other negative ecological impacts.

Therefore, The correct option is (A): Algal blooms caused by excess of organic matter in water in water improve water quality and promote fisheries