Download AKTU B-Tech 4th Sem 2018-19 RAS402 Environment Ecology Question Paper

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Printed Pages: 02 Sub Code: RAS402

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Paper Id: 199278 Roll No.

B. TECH.

(SEM IV) THEORY EXAMINATION 2018-19

ENVIRONMENT & ECOLOGY

Time: 3 Hours Total Marks: 70

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Note: Attempt all Sections. If require any missing data; then choose suitably.

SECTION A

1. Attempt all questions in brief. 2 x 7 = 14

1. Explain bio-magnification with examples.
2. Why is the greenhouse effect necessary for the Earth?

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3. Define BAP and its source of production.
4. "Sea is a major sequestering medium of carbon”. Justify it.
5. Define BOD.
6. Explain flood and its main causes.
7. What do you understand by the term “Biotic and Abiotic” with examples?

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SECTION B

2. Attempt any three of the following: 7 x 3 = 21

1. What are the different ways to restore the damage to the ecosystem? Explain In-situ approach for conservation of ecosystem.
2. Draw and explain the nitrogen cycle. Explain nitrification and denitrification process.
3. What is meant by environment? Enumerate and discuss its various components.

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4. Define the term biodiversity? Explain the types and importance of biodiversity in detail.
5. Explain the need for education for controlling pollution? What are bio-indicators and their types?

SECTION C

3. Attempt any one part of the following: 7 x 1 = 7

1. Define biomass and biogas energy. Explain the different types of biogas plants with suitable diagrams.

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2. Explain why water logging and salinity are responsible for decrease in soil fertility.

4. Attempt any one part of the following: 7 x 1 = 7

1. Write an explanatory note on the multidisciplinary nature and importance of environmental studies.
2. Explain the term food chain and food web. Depict the various types of food chains and food webs with suitable examples.

5. Attempt any one part of the following: 7 x 1 = 7

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1. What is air pollution? Explain the different sources, effects and controlling measures of air pollution.
2. Discuss in brief the salient feature of the Water (Prevention and Control of Pollution) Act, 1974.

6. Attempt any one part of the following: 7 x 1 = 7

1. What is depletion of the ozone layer? Give causes and effects of deletion of the ozone layer.
2. Discuss the adverse impact of urbanization and industrialization on the environment and suggest suitable remedial measures.

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7. Attempt any one part of the following: 7 x 1 = 7

1. Describe what are the functions of NGOs for controlling pollution.
2. What do you understand by the term ‘solid waste management'? Name and briefly discuss the basic functional elements of solid waste management.