Full Marks: 30
Time: 1 hour.
The figures in the margin indicate full marks for the questions.
1. Fill in the blanks: 1x5=5
(a) The components of biotic environment are ____, ____ and ____.
(b) ____ is a group of individuals of the same species occupying a given area at a given time.
(c) The Wildlife Protection Act was enacted in the year ____ in India.
(d) Groundwater is a ____ kind of natural resource.
(e) The causal organism of cholera is ____.
2. Write very short answers of the following: 1x5=5
(a) What is the role of ozone present in the stratosphere?
(b) What is trophic level?
(c) Mention two conservative measures for land resources.
(d) Name any two principal pollutants emitted by vehicles.
(e) Write the full form of WCED.
3. Answer any five questions from the following: 2x5=10
(a) Write the objectives and the guiding principles for environmental education.
(b) What is meant by ecosystem?
(c) What is genetic biodiversity?
(d) Write brief note on mineral resources of North-East India.
(e) Explain the effects of deforestation on environment.
(f) What do you mean by global warming?
(g) What are natural and artificial disasters?
(h) Write any two national conservation strategies for biodiversity.
4. Answer any two from the following: 5x2=10
(a) How does environmental awareness help to protect our environment?
(b) Write an account on structure and functions of an ecosystem.
(c) What is water pollution? Identify the sources of water pollution. Mention few effects of water pollution on human health.
(d) Describe the different steps involved in rainwater harvesting.