Q. No.Measuring Biochemical Oxygen Demand (BOD) is a method used for
1. estimating the amount of organic matter in sewage water
2. working out the efficiency of oil driven automobile engines
3. measuring the activity of Saccharomyces cerevisae in producing curd on a commercial
scale
4. working out the efficiency of RBCs about their capacity to carry oxygen
Increase in concentration of the toxicant at successive tropic levels is known as
1. biomagnification
2. biodeterioration
3. biotransformation
4. biogeochemical cycling
High concentrations of accumulated DDT in birds
1. kills pathogens in their blood
2. causes sterility by affecting gametogenesis
3. leads to premature breaking of eggs
4. causes spasticity of the muscles ofthe body
Match the items given in Column I with those in Column II and select the correct option given below:
| Column I | Column II | ||
| (a) | Eutrophication | (i) | UV-B radiation |
| (b) | Sanitary landfill | (ii) | Deforestation |
| (c) | Snow blindness | (iii) | Nutrient enrichment |
| (d) | Jhum cultivation | (iv) | Waste disposal |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (ii) | (i) | (iii) | (iv) |
| 2. | (i) | (iii) | (iv) | (ii) |
| 3. | (iii) | (iv) | (i) | (ii) |
| 4. | (i) | (ii) | (iv) | (iii) |
Natural ageing of a lake by biological enrichment of its water is known as:
1. Eutrophication
2. Biomagnification
3. Bioremediation
4. Biofortification
Match the items in column I and column II and choose the correct option :-
|
|
Column I |
|
Column Il |
|
A |
UV rays |
i |
Biomagnification |
|
B |
Biodegradable organic matter |
ii |
Eutrophication |
|
C |
DDT |
Iii |
Snow blindness |
|
D |
Phosphates |
iv |
BOD |
The correct match is :-
1. A-ii, B-i, C-iv, D-iii
2. A-iii, B-ii, C-iv, D-i
3. A-iii, B-iv, C-i, D-ii
4. A-iii, B-i, C-iv, D-i
An example of integrated waste water treatment comes from
(1) The town of Arcata along northern coast of California and biologist of Humboldt State University
(2) The town of Bangalore and biologist of Humboldt State University
(3) The town of New York along northern coast of California and biologist of Purdue University
(4) The town of Arcata along northern coast of California and biologist Purdue University
Which of the following is harmful for aquatic organisms?
(1) Thermal wastewaters
(2) Agricultural waste
(3) Industrial waste
(4) All of these
Natural ageing of a lake by biological enrichment of its water is called
1. Biomagnification
2. Eutrophication
3. Algal blooms
4. Toxification
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