M.Sc. (Semester (CBCS) Examination Nov/Dec-2018
Botany
PLANT ECOLOGY
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Draw a neat, well labeled, complete diagram wherever necessary.
Use of calculators, cell phones, or any other electronic gadgets is
prohibited.
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
An organism that cannot make its own food is called
Heterotroph Chemotroph
Autotroph Producer
EIA is
Environmental intact assessment
Ecological impact assessment
Environmental impact assessment
None of these
is known as water hyacinth.
Eichhornia crassipes Marsilea quadrifolia
Salvinia molesta Hydrilla verticillata
In Phytoextraction process is essential.
Excretion Dehydration
Chelation Secretion
In lentic wetlands is a open water zone.
Profundal Pelagic
Benthic zone All of the above
Remote Sensing include
Interaction of EMR with earth's surface
Detection of energy by the sensor
Processing and analysis of the sensor data
All of these
is non-green house gas.
Methane Nitrous oxide
Oxygen Chlorofluorocarbons
An agricultural field is supposed to be a source of pollution.
Single point Point source
Non point source All of these
is not a functional unit of an ecosystem?
Productivity Stratification
Energy flow Decomposition
10) are sensitive only to radiation from a natural origin.
Active sensors Passive sensors
Chemical sensors Electrical sensors
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SLR-VD-95
11) The final stable community in ecological succession is
Climax Sere
Pioneers Carnivores
12) RADAR is an example of
Passive sensors Active sensors
Neutral sensors Both a and b
13) Biosphere reserves are areas comprising ecosystems.
Terrestrial Marine
Coastal All of these
14) The Earth's ozone layer is mainly found in the lower portion of the
stratosphere from approximately
10 to 20 km 20 to 30 km
30 to 40 km 40 to 50 km
Q.2 Answer the following:- (Any four) 08
Define an ecosystem and mention its types.
Give wetland characteristics.
Mention causes of groundwater pollution.
What are Xenobiotics?
Enlist active sensors in remote sensing.
Write notes on. (Any two) 06
Ozone depletion
Bioremediation
Role of decomposers in an ecosystem.
Q.3 Answer the following:- (Any two) 08
Climatic climax
Water hyacinth
Bioaccumulation of pollutants
Answer the following:- (Any one) 06
Explain effects of water pollution.
Give applications of remote sensing technique in wild life management.
Q.4 Answer the following:- (Any two) 10
Give structural components of an ecosystem.
MAB
Biotransformation
Answer the following:- (Any one) 04
Phytoextraction
Carbon Credit
Q.5 Answer the following:- (Any two) 14
Give significance of remote sensing in vegetation mapping.
Explain in detail fresh water ecosystem.
Write an essay on 'environmental toxicology'.