A population with natality equal to mortality is .... .... [A.F.M.C.2009]
50%
a) Increasing
0%
b) Declining
50%
c) Stable
0%
d) Growing
Q.2.
Soil carried by gravity is .... .... [Bih.P.M.T. 2002]
100%
a) Alluvial
0%
b) Eluvial
0%
c) Colluvial
0%
d) Glacial
Q.3.
The phenomenon of one organism being benefitted without affecting the other is .... .... [H.P.P.M.T. 2011]
100%
a) Scavenging
0%
b) Amensalism
0%
c) Commensalism
0%
d) Symbiosis
Q.4.
A protective device in a community is .... .... [Kerala 2001]
0%
a) Commensalism
100%
b) Mimicry
0%
c) Parasitism
0%
d) Competition
Q.5.
Information about birth rate, death rate, sex ratio, age distribution, etc of a population is obtained from .... .... [M.P.P.M.T. 1994]
0%
a) Mortality table
0%
b) Life table
0%
c) Natality table
100%
d) Both A and C
Q.6.
Ecotone is ..... ..... [D.P.M.T. 2005]
100%
a) Transitional area between two communities
0%
b) Interaction between two populations
0%
c) Development of ecads
0%
d) Development of ecotypes
Q.7.
. Plants living partly inside water and partly above it are .... .... [Odisha 2008]
100%
a) Monerans and fungi
0%
b) Producers and consumer plants
0%
c) Consumer protists and fungi
0%
d) Monerans and producer protists
Q.8.
What is wrong about xerophytes .... .... [C.P.M.T.1994]
0%
a) Sunken stomata
100%
b) Small spiny leaves
0%
c) Thick cuticle
0%
d) Larger number of stomata
Q.9.
ASSERTION: True xerophytes store water in the form of mucilage which helps to withstand prolonged period of droughts. REASON: Vascular and mechanical tissue are well developed in true xerophytes .... .... [E.A.M.C.E.T.2009]
100%
a) Both a and r are correct and r is correct explanation of a
0%
b) Both a and r are correct but r is not correct explanation of a
0%
c) a is true but r is false
0%
d) a is false but r is true
Q.10.
After exponential increase, population becomes stagnant. The growth curve is .... .... [Pb.P.M.T. 1998]
100%
a) J-shaped
0%
b) S-shaped
0%
c) Fluctuating
0%
d) Circular
Q.11.
Which one is a xerophytes? .... ..... [R.P.M.T.2005]
100%
a) Capparis
0%
b) Lotus
0%
c) China rose
0%
d) Casuarina
Q.12.
Ozone layer is found in .... .... [Kerala2001]
0%
a) Thermosphere
100%
b) Stratosphere
0%
c) Mesosphere
0%
d) Lithosphere
Q.13.
Number of immigration is more than emigration and death is lower than natality. Growth curve of population will show .... .... [Har. P.M.T. 2000]
0%
a) Exponential phase
100%
b) Lag phase
0%
c) Declining phase
0%
d) Steady phase
Q.14.
Mycorrhiza is a .... .....
100%
a) Parasitic relation between fungus and root
0%
b) Mutualistic relation between fungus and whole plant
0%
c) Mutualistic relation between fungus and root
0%
d) Parasitic relation between fungus and plant
Q.15.
Parasitic phanerogam absorb water and solute from host plant by .... .... [J.K.C.M.E.E.2010]
0%
a) Mycorrhiza
0%
b) Clinging roots
0%
c) Adventitious roots
100%
d) Haustoria
Q.16.
Water holding capacity is highest in .... .... [R.P.M.T.1995]
0%
a) Sandy soil
0%
b) Silt soil
0%
c) Clay soil
100%
d) Loam soil
Q.17.
The most important factor which determined the increase in human population in India during 20th century has been .... .... [D.P.M.T. 2011]
100%
a) Mortality
0%
b) Immigration
0%
c) Emigration
0%
d) Natality
Q.18.
Study of inter-relationships between organisms and their environment is .... .... [B.H.U.1999]
0%
a) Ecology
100%
b) Ecosystem
0%
c) Phytogeography
0%
d) Ethology
Q.19.
Which is correct for secondary succession .... .... [C.B.S.E 2011]
0%
a) It follows primary succession
100%
b) It is similar but faster than primary succession
0%
c) It begins on bare rock
0%
d) It occurs on deforested site
Q.20.
Last stabilised community in a plants succession is known as .... .... [D.P.M.T 2009]
0%
a) Seral community
0%
b) Pioneer community
0%
c) Ecosere
100%
d) Climax community
Q.21.
In change in population size, Nt = N0 + B + I - D - E. What do I, B, D stand for rates of .... .... [Kerala 2008]
100%
a) Immigration, mortality, natality
0%
b) Immigration, natality, mortality
0%
c) Emigration, natality, mortality
0%
d) Mortality, natality, immigration
Q.22.
Humus is ..... ..... [Har.P.M.T.2003]
100%
a) Completely decomposed organic matter
0%
b) Partially decomposed organic matter
0%
c) Partially decomposed inorganic matter
0%
d) Completely decomposed inorganic matter
Q.23.
Nature of climax community depends upon .... .... [C.B.S.E. 1996]
100%
a) Water
0%
b) Temperature
0%
c) Soil fertility
0%
d) Climate
Q.24.
Zone of atmosphere near the ground is .... .... [K.C.E.T.2003]
100%
a) Troposphere
0%
b) Stratosphere
0%
c) Mesosphere
0%
d) Homosphere
Q.25.
ASSERTION: Salt resistant plants survive in saline habitats by maintaining low internal Na+ level REASON: Salt resistant plants get rid of excess Na+ by ATP energised antiporter .... ..... [E.A.M.C.E.T. 2008]
100%
a) Both a and r are correct and r is correct explanation of a
0%
b) Both a and r are correct but r is not correct explanation of a
0%
c) a is true but r is false
0%
d) a is false but r is true
Q.26.
An area of soil thoroughly wetted and allowed to drain till percolation stops will have a water content called .... .... [M.P.P.M.T.1990]
100%
a) Capillary water
0%
b) Storage water
0%
c) Field capacity
0%
d) Gravitational water
Q.27.
At which latitude heat gain through isolation approximately equals heat loss through terrestrial radiation .... ..... [ C.B.S.E.2005]
100%
a) 22.5 North and South
0%
b) 40 North and South
0%
c) 42.5 North and South
0%
d) 66 North and South
Q.28.
Niche of species is .... .... [C.B.S.E.1996]
0%
a) Place of living
100%
b) Specific functions and competitive power
0%
c) Habitat and specific functions
0%
d) None of the above
Q.29.
Select the correct matches a. sedimentary nutrient cycle - nitrogen cycle b. pioneer species - lichens c. secondary succession - burnt forest d. pyramid of biomass in sea - upright Kerala 2011
100%
a) a, b and d only
0%
b) b and c only
0%
c) a and c only
0%
d) a, b, and c only
Q.30.
A population with equal number of births and deaths will show .... .... [A.F.M.C. 2002]
100%
a) Acceleration phase of growth
0%
b) Plateau phase
0%
c) Exponential growth phase
0%
d) Initial phase of growth
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