2017
ENVIRONMENTAL STUDIES
Full Marks: 80
Time: 3 hours
(The figures in the margin indicate full marks for the questions)
1. (a) Give answers: 1x5=5
1) What is food chain?
2) Name the first book to record endangered species.
3) Define sustainable development.
4) What is methaemoglobinemia?
5) What is called those species found only in certain geographical areas?
6) Which toxic gas was responsible for Bhopal tragedy?
7) How many biosphere reserves are found in India?
2. Answer any four of the following: 2x4=8
1) Differentiate between grazing food chain and detritus food chain.
2) Define biomagnifications with causes.
3) What are the types of soil pollution?
4) Define genetic and species diversity.
5) What are the impacts of greenhouse effect?
3. Answer any six of the following: 5x6=30
1) What is ecological pyramid? Write briefly about its different types.
2) Write about in-situ and ex-situ conservation of biodiversity.
3) Define global warming. Write about the sources of global warming.
4) What is ecological succession? Differentiate between primary and secondary succession.
5) Write short notes: 2.5x2=5
a) Food web.
b) Loatic ecosystem.
c) Sanctuary.
6) Discuss the salient features of marine ecosystem.
7) What is acid rain? Describe its ill effects.
8) Write a note on environmental ethics.
4. Describe the causes of extinction biodiversity. 10
Or
What are biomes? Explain the types of tropical evergreen forest and grassland biomes. 2+4+4=10
5. Define air pollution. Write about the sources of air pollution and its effect on animals and human being. 2+4+4=10
Or
What are watersheds? Why there is need of their management? List certain measures to be taken for watershed management. 2+4+4=10
6. Discuss the various renewable and non-renewable resources of energy. 5+5=10
Or
Discuss about the basic structure of an ecosystem. 10
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