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Quiz 5
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Q.1
Relationship between different organisms can best be studied by .... .... [D.P.M.T.2001]
0%
a) Food webs
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b) Pyramid of mass
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c) Pyramid of energy
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d) Eltonian pyramids
Explanation
Answer : (d)
Q.2
Soil fertility is reduced by .... .... [C.B.S.E. 1992]
0%
a) Crop rotation
0%
b) Nitrogen fixing bacteria
0%
c) Decaying organic matter
0%
d) Intensive agriculture
Explanation
Answer : (d)
Q.3
Green plants constitute ..... ..... [M.P.P.M.T.1999]
0%
a) First trophic level
0%
b) Second trophic level
0%
c) Third trophic level
0%
d) Fourth trophic level
Explanation
Answer:(a)
Q.4
An inverted pyramid of numbers and an inverted pyramid of biomass are respectively seen in .... .... [Kerala 2012]
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a) Grassland tree ecosystem
0%
b) Sea and tree ecosystem
0%
c) tree and sea ecosystem
0%
d) Tree and grassland ecosystem
Explanation
Answer : (c)
Q.5
Biological equilibrium is equilibrium amongst .... ..... [BiharP.M.T.2001]
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a) Producers and decomposers
0%
b) Producers and consumers
0%
c) Producers and decomposers, consumers
0%
d) Consumers and decomposers
Explanation
Answer : (c)
Q.6
Para rubber is obtained from the latex of .... .... [J.K.C.M.E.E. 2007]
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a) Ficus elastica
0%
b) Hevea brasiliensis
0%
c) Carica papaya
0%
d) Musa paradisiaca
Explanation
Answer : (b)
Q.7
Second most important trophic level in a lake is ..... ..... [C.B.S.E.1994]
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a) Zooplankton
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b) Phytoplankton
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c) Benthos
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d) Neuston
Explanation
Answer : (a)
Q.8
Nitrates are transformed into nitrogen by .... .... [C.P.M.T.2003]
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a) Ammonifying bacteria
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b) Nitrifying bacteria
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c) Denitrifying bacteria
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d) Both A and B
Explanation
Answer : (c)
Q.9
Planting of trees, shrubs and others in between crops plants for stabilization of soil is .... .... [M.H. T.C.E.T. 2008]
0%
a) Taungya
0%
b) Soil forestry
0%
c) Production plantation
0%
d) Agroforestry
Explanation
Answer : (d)
Q.10
In an ecosystem, bacteria are .... ..... [M.P.P.M.T.1997]
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a) Microconsumers.
0%
b) Macroconsumers
0%
c) Primary consumers
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d) Secondary consumers
Explanation
Answer : (a)
Q.11
Pyramid of numbers in grass ecosystem is .... .... [B.H.U.2002]
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a) Linear
0%
b) Upright
0%
c) Inverted
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d) Negative
Explanation
Answer : (b)
Q.12
Removal of top fertile soil by wind or water is .... .... [B.H.U. 1991]
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a) Siltation
0%
b) Soil erosion
0%
c) Weathering of soil
0%
d) Leaching
Explanation
Answer : (b)
Q.13
Lion is .... .... [E.A.M.C.E.T.1995]
0%
a) Producer
0%
b) Primary consumer
0%
c) Predator
0%
d) Secondary consumer
Explanation
Answer : (c)
Q.14
An antiforest measure is .... .... [Pb.P.M.T. 2003]
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a) Afforestation
0%
b) Selective grazing
0%
c) Clearing forest
0%
d) Selective felling
Explanation
Answer : (c)
Q.15
Role of bacteria in carbon cycle is .... .... [C.B.S.E.1998]
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a) Photosynthesis
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b) Chemosynthesis
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c) Breakdown of organic compounds
0%
d) Assimilation of nitrogen compounds
Explanation
Answer : (c)
Q.16
Sal forest is a ..... ..... [Pb.P.M.T.1998]
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a) Deciduous forest
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b) Evergreen forest
0%
c) Rain forest
0%
d) None
Explanation
Answer : (a)
Q.17
In a food chain, man is .... ..... [C.P.M.T.1993]
0%
a) Primary and Secondary consumers
0%
b) Primary consumers
0%
c) Secondary consumers
0%
d) Producers
Explanation
Answer : (a)
Q.18
An easily disturbed ecosystem which can recover after some time after the stoppage of damaging factor is .... .... [C.B.S.E.2004]
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a) Lower stability and high resilience
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b) Lower stability and low resilience
0%
c) Higher stability and high resilience
0%
d) Higher stability and low resilience
Explanation
Answer : (a)
Q.19
Which is false about food chain .... .... [Kerala 2011]
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a) Grazing food chain is major conduit of energy for a aquatic ecosystem
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b) In terrestrial ecosystem, large fraction of energy flows through detritus food chain
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c) Primary consumers belong to first trophic level
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d) Cockroaches and crows are omnivores
Explanation
Answer : (c)
Q.20
Amount of energy transferred from one tropic level to next is .... ..... [C.P.M.T.2008]
0%
a) 1.5%
0%
b) 10%
0%
c) 15%
0%
d) 20%
Explanation
Answer : (b)
Q.21
Ten percent law of energy transfer in food chain was given by .... .... [C.E.T.Chd2010]
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a) Elton
0%
b) Haeckel
0%
c) Lindeman
0%
d) Schimper
Explanation
Answer : (c)
Q.22
Amount of alcohol allowed to be mixed with petrol in India is .... .... [C.B.S.E. 2004]
0%
a) 2.5%
0%
b) 5%
0%
c) 10%
0%
d) 5-10%
Explanation
Answer : (b)
Q.23
Who proposed the concept of ecological pyramids? .... .... [C.E.T.Chd.1997]
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a) Odum
0%
b) Elements
0%
c) Tansley
0%
d) Elton
Explanation
Answer : (d)
Q.24
Petroleum is a .... .... [C.B.S.E. 1992]
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a) Synthetic product
0%
b) Renewable resource
0%
c) Nonrenewable resource
0%
d) Inconvenient resources
Explanation
Answer : (c)
Q.25
Most vital process for existence of life on earth is .... ..... [E.A.M.C.E.T.1999]
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a) Reproduction of plants and animals
0%
b) Respiration of animals
0%
c) Photosynthesis by plants
0%
d) Communication in animals
Explanation
Answer : (c)
Q.26
Total amount of living material at various level of a food chain is depicated by .... .... [D.P.M.T.1999]
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a) Pyramid of energy
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b) Pyramid of numbers
0%
c) Pyramid of biomass
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d) All the above
Explanation
Answer : (c)
Q.27
Desert biome does not support much vegetation as it lacks
0%
a) Sufficient light
0%
b) Favourable temperature
0%
c) Sufficient water
0%
d) Sufficient nutrients
Explanation
Answer : (c)
Q.28
Minimum components needed for an ecosystem to survive are .... .... [D.P.M.T.2011]
0%
a) Producers and primary consumer
0%
b) Producers and primary carnivores
0%
c) Producers and decomposers
0%
d) Producers and decomposers, consumers
Explanation
Answer : (c)
Q.29
Which is a non –renewable resource ? .... ..... [Kerala 2009]
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a) Water
0%
b) Forest
0%
c) Mineral
0%
d) Solar energy
Explanation
Answer : (c)
Q.30
A food chain comprises .... .... [M.P.P.M.T.2000]
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a) Producers, herbivores and carnivores
0%
b) Producers, consumers and decomposer
0%
c) Producers and primary consumers
0%
d) Producers, carnivores and decomposers
Explanation
Answer : (a)
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