Q. Consider the following statements I. Algal blooms are formed by free floating algae II. Algal bloom causes fish mortality and deterioration of water quality III. Water hyacinth, the world’s most problematic aquatic weed is also called ‘Terror of Bengal’ Which of the statements given above are correct about algal blooms?
A) I and II
B) I and III
C) II and III
D) I, II and III
Explanation
The excess growth of planktonic algae that causes colouration of water is called algal blooms. They are toxic to animals and humans. In some cases, eutrophic water-bodies support excessive growth of floating plants. Water hyacinth (Eichhornia crassipes) also called ‘Terror of Bengal’ is one such plant that sometimes chokes ponds, lakes and rivers resulting in imbalance of ecosystem dynamics of water-bodies
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.