M.Sc. (Botany) (Semester (CBCS) Examination, 2017
PLANT ECOLOGY
Day Date: Saturday, 22-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
N.B. Attempt in all five questions.
Section-I is compulsory.
Attempt any two questions from Section II and any
two questions from Section III.
Figures to the right indicate full marks.
Q.1 Rewrite the following sentences by choosing correct alternatives: 14
An is a community of living organisms in conjunction with
the nonliving components of their environment.
succession ecosystem biosphere forest
In ecology, succession is the succession which driven by
the abiotic components of an ecosystem.
allogenic heterogenic autogenic homogenic
IUCN was established in
1945 1951 1948 1940
Biosphere reserves are areas comprising ecosystem
terrestrial marine coastal all of these
Mangroves are growing in ecosystems.
Riverine Estuarine Scrub jungles Grassland
are expelled from high temperature combustion, and are
also produced during thunderstorms by electric discharge.
Sulfur oxides
Nitrogrn oxides
Volatile organic compounds(VOC)
Carbon monoxide
The energy that flows through ecosystems is obtained primarily
from the
moon sun producers consumers
is the major cycled within wetlands.
oxygen Humus Magnesium Carbon
A greenhouse gas is a gas in an atmosphere that absorbs and
emits radiation within the thermal
UV visible dark infrared
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10) Climatic factors include
rain temperature wind all of these
11) As the green plants manufacture their own food they are known as

heterotrophs autotrophs
consumers decomposers
12) The Indian government has established
Reserves in India.
15 16 10 18
13) The emission of ODS account for roughly total Depletion
of ozone layer in stratosphere.
80% 90% 95% 72%
14) MAB aims to establish a scientific basis for the improvement of
relationships between
people and their environments
wetlands and their environments
ecosystem and their environments
forest and their environments
Serction II
Q.2 Explain in detail fresh water ecosystem 07
What is land pollution? Comment up on pesticide residue and
their effects on soil.
07
Q.3 Write an essay on 'environmental toxicology' studied by you. 07
Comment up on applications of remote sensing technique in
vegetation analysis and wild life management.
07
Q.4 What are the wetlands? Explain characteristic features of
wetlands.
07
Impact of toxic environment on ecosystems. 07
(Section III)
Q.5 Effects of water pollution. 05
IUCN. 05
Phytovolatization 04
Q.6 Mangrove ecosystem. 05
Green house gases 05
Rhizofiltration 04
Q.7 Writes note on any three 14
Climatic climax
MAB.
Effects of water pollution
Toxic chemicals