Advertisements
Advertisements
प्रश्न
Why is Eichhornia crassipes nicknamed as “Terror of Bengal”?
उत्तर
The plant Eichhornia crassipes is nicknamed as the “Terror of Bengal” because it grows at an alarming rate and spreads on the surface of the water body. This cut out of the light and it also causes an increase in the oxygen demand. Thus, causing the death of fishes and other aquatic organisms.
APPEARS IN
संबंधित प्रश्न
How does algal bloom destroy the quality of a fresh water body? Explain.
Name the two different categories of microbes naturally occurring in sewage water.
List the events that reduce the Biochemical Oxygen Demand (BOD) of a primary effluent during sewage treatment.
Write critical notes on Eutrophication
Write critical notes Biological magnification
Plenty of algal bloom is observed in a pond in your locality.
(a) Write what has caused this bloom and how does it affect the quality of water.
(b) Suggest a preventive measure.
Answer the following question:
While on a visit to a pond in the city-neighborhood, the visitors were delighted to find a large expanse of water covered with colorful algal mass.
Explain the cause of such algal growth.
Biomagnification is caused mainly by ______.
Which one of the following diseases is not caused due to contamination of water?
Match the following and choose the correct option.
| Column I | Column II | ||
| A. | Environment Protection Act | i. | 1974 |
| B. | Air Prevention & Control of Pollution Act | ii. | 1987 |
| C. | Water Act | iii. | 1986 |
| D. | Amendment of Air Act to include noise as an air pollutant | iv. | 1981 |
The correct matches is;
