Which one of the following statements is NOT correct?
Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries
Water hyacinth grows abundantly in eutrophic water bodies and leads to an imbalance in the ecosystem
dynamics of the water body
The amount of some toxic substances of industrial waste water increases in the organisms at
successive trophic levels
The 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
