BOT/V/CC/15 Student's Copy
2 0 1 8
CBCS
5th Semester
BOTANY
EIGHTH PAPER
Environmental Biology and Ethnobotany
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 10
Tick the correct answer in the brackets provided 1×10=10
1. Environmental factors which deal with the structure of the soil are
termed as
edaphic factors
topographic factors
biotic factors
climatic factors
2. The global environment is made up of
atmosphere
lithosphere
hydrosphere
All of the above
3. Which of the following produces the most damaging acid rain?
Sulphur dioxide
Carbon dioxide
Carbon monoxide
Hydrogen sulphide
/145 1 Contd.
4. The radiation that is absorbed by the layer of ozone in the stratosphere is
infrared rays
cosmic radiations
ultraviolet rays
visible rays
5. Conservation of biodiversity in controlled condition of zoos, gardens,
sanctuaries is known as
ex situ conservation
in situ conservation
natural conservation
None of the above
6. The Environmental (Protection) Act was enacted in the year
1986
1992
1984
1974
7. Savannas are grasslands with
thick trees
bushes
scattered trees
no trees
8. Hot spots are region of high
rarity
endemism
critically endangered population
diversity
9. The staple food of Mizoram is
Triticum aestivum
Hordeum vulgare
Oryza sativa
Avena sativa
10. Gossypium arboreum is
fibre-yielding plant
fruit plant
fodder plant
medicinal plant
BOT/V/CC/15/145 2 Contd.
SECTION—B
Marks 15
Write notes on the following in brief 3×5=15
1. Biogeochemical cycle
OR
Red Data Book
2. Biomagnification
OR
Topographic factor
3. Patent
OR
Non-conventional energy source
4. Phytogeography
OR
Phytogeographic divisions of world
5. Three botanical names and families of fibre-yielding plants
OR
Plants in folklore
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
Answer five questions, taking one from each Unit
UNIT—I
1. What do you mean by natural resources? Explain the renewable and
non-renewable resources. 2+8=10
2. Describe in brief any two of the following 5×2=10
Carbon cycle
Types of biodiversity
Interaction of environmental factors
BOT/V/CC/15/145 3 Contd.
UNIT—II
3. What is greenhouse effect? Discuss the causes of global warming and
various remedial measures to check it. 2+8=10
4. Write brief notes on any two of the following 5×2=10
Radioactive waste management
Non-biodegradable pollutants
Acid rain
UNIT—III
5. Describe the various measures of soil conservation. 10
6. Describe in brief any two of the following 5×2=10
Environmental laws
Biodiversity conservation
Water resources
UNIT—IV
7. Describe the vegetational zone in Eastern and Western Himalayas. 10
8. Write short notes on any two of the following 5×2=10
Endemism
Hot spots
Grassland vegetation in India
UNIT—V
9. What is ethnobotany? Describe its scope in India. 2+8=10
10. Write notes on any two of the following 5×2=10
Two fruit-yielding plants with scientific names, families and uses
Two fodder plants with scientific names, families and uses
Two medicinal plants with scientific names, families and uses