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प्रश्न
Write critical notes on Eutrophication
उत्तर
Eutrophication:- It is the natural ageing process of a lake caused due to nutrient enrichment. It is brought down by the runoff of nutrients such as animal wastes, fertilizers, and sewage from land which leads to an increased fertility of the lake. As a result, it causes a tremendous increase in the primary productivity of the ecosystem. This leads to an increased growth of algae, resulting into algal blooms. Later, the decomposition of these algae depletes the supply of oxygen, leading to the death of other aquatic animal life.
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संबंधित प्रश्न
Name the two different categories of microbes naturally occurring in sewage water.
"Determination of Biological Oxygen Demand (BOD) can help in suggesting the quality of a water body." Explain.
Two types of aquatic organisms in a lake show specific growth patterns as shown below, in a brief period of time. The lake is adjacent to an agricultural land extensively supplied with fertilisers.
Answer the questions based on the facts given above:
(i) Name the organisms depicting the patterns A and B.
(ii) State the reason for the growth pattern seen in A.
(iii) Write the effects of the growth patterns seen above.
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.
Explain the role of microbes in cleaning sewage water into usable water.
What is Biochemical Oxygen Demand significance in an aquatic ecosystem?
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.
As a student of biology, do you agree with their delight? Give reasons in support of your answer.
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 ______.
The expanded form of DDT is ______.
The green scum seen in the fresh water bodies is ______.
The loudness of a sound that a person can withstand without discomfort is about ______.
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 are:
It is a common practice to undertake desilting of the overhead water tanks. What is the possible source of silt that gets deposited in the water tanks?
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 The correct matches is | iv. 1981 |
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;
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 |
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;
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 |
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;
