M.Sc. (Semester (CBCS) Examination Mar/Apr-2018
Botany
PLANT ECOLOGY
Time: 2½ Hours
Max. Marks: 70
Instructions: Answers any five questions. Figures to the right indicate full marks. Question 1 is compulsory. Answer any two essay questions from Q.2, 3 4. Answer any two short notes questions from Q.5, 6 7.
Q.1
Choose the correct answer form the given alternatives:-
14
Trophic level in ecosystem is formed by
only herbivores
only plants
only bacteria
Organism linked in food chain
All of the members of a particular species that live in one area are called a
Biome
Population
Community
Ecosystem
Which one of the following is not a functional unit of an ecosystem?
Productivity
Stratification

Energy flow
Decomposition
MAB is
Man and the Biodiversity
Man and the Biology
Man and the Biosphere
Man and the Biome
EIA is the assessment of the environmental consequences.
only positive
only negative
both positive and negative
none of these
is suppose to be most reproductive ecosystem in world.
Mangrove
Ocean
Lake
Grassland
In remote sensing are concerns with the time lapse between two successive images of the same area.
Spatial resolution
Spectral resolution
P
Temporal resolution
Pixel resolution
are sensitive only to radiation from a natural origin.
Active sensors
Passive sensors
Chemical sensors
Electrical sensors
The ozone layer prevents light wavelengths.
visible
dark
O
infrared
ultraviolet
Page 2 of 2
SLR-UD-114
10) The tendency of pollutants to concentrate as they move from one trophic level to the nextis known as
bioaccumulation
biomagnification
biostatistic
biotransformation
11) is the increase of Earth's average surface temperature due to effect greenhouse gases.
Global warming
Global cooling
Global marketing
Globalization
12) Heavy metals can be removed by process.
Phytoextraction
Biotransformation
Bioaccumulation
Biomagnification
13) CFC refers to
Chlorincarbon
Chloroflurocadmium
Chlorofluorocarbon
All of these
14) Water hyacinth is native to the
America
Asia
Australia
Amazon basin
Q.2
Describe various stages in succession with suitable example.
Explain various causes of ozone depletion.
14
Q.3
Give an account on impact of toxic environment on ecosystems.
Define phytoextraction and describe stages involved in it.
14
Q.4
Comment upon green house effect.
Explain in detail fresh water ecosystem.
14
Q.5
Describe:
14
Rhizofiltration
Water hyacinth
Bio-accumulation of pollutants
Q.6
Explain:-
14
Carbon credit
Structural components of an ecosystem.
Phytoextraction
Q.7
Write a short note
14
Consequences of climate changes
MAB
Remote sensing in vegetation.