Gauhati University Question Papers: Environmental Studies (NOV-DEC’ 2013)

Gauhati University Question Papers
Environmental Studies (NOV-DEC’ 2013)
Full Marks: 75
Time Allowed: 3 hours
Answer either in English or Assamese
The figures in the margin indicate full marks for the questions
1. What are the different segments of global environment? Discuss briefly and highlight the interactions among them. 10

What are the ecological services provided by forests? Discuss briefly.
2. (a) What is biodiversity? Illustrate the terms – genetic diversity, species diversity and ecosystem diversity with examples.                                                 5
What do you mean by extinct, endangered, vulnerable and rare species? Explain with suitable examples.              5
(b) What do you mean by equitable of natural resources? How is it related with sustainable development?   5
What do you mean by land degradation? Discuss the causes and consequences of land degradation.          5
3. (a) Fill in the blanks:                                   2
1)         BOD stands for _____.
2)         Fuel wood is an example of _____ sources of energy.
3)         About _____% of global water reserves is readily available for human use in the form of grounds water and surface water.
4)         Removal of impurities from grade ores by suitable bacteria is known as _____ technique.
(b) Express in one word/term:                               2
1)         A transition zone between adjacent ecosystems.
2)         Organisms in the ecosystem those feed on autotrophys and/or heterotrophs.
3)         A chemical element or inorganic compound existing naturally.
4)         The life-supporting regions of the earth.
(c) Illustrate the following terms with suitable examples:                          2x3=6
1)         Habit.
2)         Food web.
3)         Genetically modified organisms.
4. Write short notes on any two of the following:                              5x2=10
a)         Ecosystem.
b)         Bio-graphical classification of India.
c)          Benefits and problems of dams.


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