Q.1
A population with natality equal to mortality is .... .... [A.F.M.C.2009]
  • a) Increasing
  • b) Declining
  • c) Stable
  • d) Growing
Q.2
Soil carried by gravity is .... .... [Bih.P.M.T. 2002]
  • a) Alluvial
  • b) Eluvial
  • c) Colluvial
  • d) Glacial
Q.3
The phenomenon of one organism being benefitted without affecting the other is .... .... [H.P.P.M.T. 2011]
  • a) Scavenging
  • b) Amensalism
  • c) Commensalism
  • d) Symbiosis
Q.4
A protective device in a community is .... .... [Kerala 2001]
  • a) Commensalism
  • b) Mimicry
  • c) Parasitism
  • 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]
  • a) Mortality table
  • b) Life table
  • c) Natality table
  • d) Both A and C
Q.6
Ecotone is ..... ..... [D.P.M.T. 2005]
  • a) Transitional area between two communities
  • b) Interaction between two populations
  • c) Development of ecads
  • d) Development of ecotypes
Q.7
. Plants living partly inside water and partly above it are .... .... [Odisha 2008]
  • a) Monerans and fungi
  • b) Producers and consumer plants
  • c) Consumer protists and fungi
  • d) Monerans and producer protists
Q.8
What is wrong about xerophytes .... .... [C.P.M.T.1994]
  • a) Sunken stomata
  • b) Small spiny leaves
  • c) Thick cuticle
  • 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]
  • a) Both a and r are correct and r is correct explanation of a
  • b) Both a and r are correct but r is not correct explanation of a
  • c) a is true but r is false
  • 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]
  • a) J-shaped
  • b) S-shaped
  • c) Fluctuating
  • d) Circular
Q.11
Which one is a xerophytes? .... ..... [R.P.M.T.2005]
  • a) Capparis
  • b) Lotus
  • c) China rose
  • d) Casuarina
Q.12
Ozone layer is found in .... .... [Kerala2001]
  • a) Thermosphere
  • b) Stratosphere
  • c) Mesosphere
  • 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]
  • a) Exponential phase
  • b) Lag phase
  • c) Declining phase
  • d) Steady phase
Q.14
Mycorrhiza is a .... .....
  • a) Parasitic relation between fungus and root
  • b) Mutualistic relation between fungus and whole plant
  • c) Mutualistic relation between fungus and root
  • 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]
  • a) Mycorrhiza
  • b) Clinging roots
  • c) Adventitious roots
  • d) Haustoria
Q.16
Water holding capacity is highest in .... .... [R.P.M.T.1995]
  • a) Sandy soil
  • b) Silt soil
  • c) Clay soil
  • 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]
  • a) Mortality
  • b) Immigration
  • c) Emigration
  • d) Natality
Q.18
Study of inter-relationships between organisms and their environment is .... .... [B.H.U.1999]
  • a) Ecology
  • b) Ecosystem
  • c) Phytogeography
  • d) Ethology
Q.19
Which is correct for secondary succession .... .... [C.B.S.E 2011]
  • a) It follows primary succession
  • b) It is similar but faster than primary succession
  • c) It begins on bare rock
  • d) It occurs on deforested site
Q.20
Last stabilised community in a plants succession is known as .... .... [D.P.M.T 2009]
  • a) Seral community
  • b) Pioneer community
  • c) Ecosere
  • 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]
  • a) Immigration, mortality, natality
  • b) Immigration, natality, mortality
  • c) Emigration, natality, mortality
  • d) Mortality, natality, immigration
Q.22
Humus is ..... ..... [Har.P.M.T.2003]
  • a) Completely decomposed organic matter
  • b) Partially decomposed organic matter
  • c) Partially decomposed inorganic matter
  • d) Completely decomposed inorganic matter
Q.23
Nature of climax community depends upon .... .... [C.B.S.E. 1996]
  • a) Water
  • b) Temperature
  • c) Soil fertility
  • d) Climate
Q.24
Zone of atmosphere near the ground is .... .... [K.C.E.T.2003]
  • a) Troposphere
  • b) Stratosphere
  • c) Mesosphere
  • 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]
  • a) Both a and r are correct and r is correct explanation of a
  • b) Both a and r are correct but r is not correct explanation of a
  • c) a is true but r is false
  • 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]
  • a) Capillary water
  • b) Storage water
  • c) Field capacity
  • d) Gravitational water
Q.27
At which latitude heat gain through isolation approximately equals heat loss through terrestrial radiation .... ..... [ C.B.S.E.2005]
  • a) 22.5 North and South
  • b) 40 North and South
  • c) 42.5 North and South
  • d) 66 North and South
Q.28
Niche of species is .... .... [C.B.S.E.1996]
  • a) Place of living
  • b) Specific functions and competitive power
  • c) Habitat and specific functions
  • 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
  • a) a, b and d only
  • b) b and c only
  • c) a and c only
  • d) a, b, and c only
Q.30
A population with equal number of births and deaths will show .... .... [A.F.M.C. 2002]
  • a) Acceleration phase of growth
  • b) Plateau phase
  • c) Exponential growth phase
  • d) Initial phase of growth
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