BOT/V/08 Student's Copy
2 0 1 8
Pre-CBCS
5th Semester
BOTANY
EIGHTH PAPER
Environmental Biology and Ethnobotany
Full Marks 55
Time 2½ hours
PART A—OBJECTIVE
Marks 20
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 5
Tick the correct answer in the brackets provided 1×5=5
1. Which of the following is renewable natural resource?
Natural gas
Coal
Nuclear energy
Water
/328 1 Contd.
2. Which of the following is responsible for ozone depletion in atmosphere?
Chlorofluorocarbon
Carbon tetrachloride
Methane
All of the above
3. Covering the soil surface by grass, leaves and straw is called
contour farming
tillage
mulching
strip cropping
4. In India, common mangrove forests are found in
Kaziranga
Sunderbans
Nilgiri Hills
Western Ghats
5. Which of the following is a medicinal plant?
Tectona grandis
Schima wallichii
Zea mays
Emblica officinalis
BOT/V/08/328 2 Contd.
SECTION—B
Marks 15
Write notes on the following in brief: 3×5=15
1. Biosphere
2. Greenhouse effect
3. Patent
4. Hot spot
5. Fibre-yielding plants
PART B—DESCRIPTIVE
Marks 35
The figures in the margin indicate full marks for the questions
1. What is biogeochemical cycle? Describe the carbon cycle with a diagram.
OR
What do you mean by natural resource? Explain the renewable and
non-renewable resources.
2. What is acid rain? Describe the causes and consequences of acid rain.

OR
Write short notes on the following 3½+3½=7
Photochemical smog
Ozone depletion
3. What do you mean by biodiversity loss? Explain in brief the ex-situ and
in-situ conservations. 2+2½+2½=7
OR
Describe briefly various measures of soil conservation. 7
BOT/V/08/328 3 Contd.
4. Describe various vegetation types of India. 7
OR
Write short notes on the following 3½+3½=7
Endemism
Floristic diversity in Alpine Zone of India
5. Write the botanical names, families and parts used of two fodder and fibreyielding
plants. 3½+3½=7
OR
Describe ethnobotany and its significance. 7