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Quiz 12
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Q.1
Which of the following communities are more vulnerable to invasion by outside animas and plants? .... .... [Pb.P.M.T. 2005]
0%
a) Tropical forest
0%
b) Mangrove
0%
c) Temperate forest
0%
d) Oceanic island communities
Explanation
Answer : (d)
Q.2
Rate of conversion of light does not possess rhizobium containing nodules .... .... [J.K.C.M.E.E.2003]
0%
a) Net primary productivity
0%
b) Gross primary productivity
0%
c) Net secondary productivity
0%
d) Gross secondary productivity
Explanation
Answer : (b)
Q.3
Source of maximum sulphur is/reservoir of sulphur is .... .... [Manipal 2004]
0%
a) Ocean
0%
b) Lakes
0%
c) Land
0%
d) Rocks
Explanation
Answer : (d)
Q.4
Main renewable source of energy .... .... [C.P.M.T. 1992]
0%
a) Forest
0%
b) Fuel gas
0%
c) Cattle
0%
d) Coal
Explanation
Answer : (a)
Q.5
Who proposed the term ecosystem? .... .... [B.H.U.2007]
0%
a) Odum
0%
b) Gardner
0%
c) Warming
0%
d) Tansley
Explanation
Answer : (d)
Q.6
Biomass available for consumers and rate of formation of new organic matter by consumers are .... .... [Kerala 2012]
0%
a) Gross primary productivity and net primary productivity
0%
b) Net primary productivity and gross primary productivity
0%
c) Gross primary productivity and secondary productivity
0%
d) Net primary productivity and secondary productivity
Explanation
Answer : (d)
Q.7
Which is correct food chain .... .... [A.M.U.2001]
0%
a) Phytoplankton → fishes → zooplankton
0%
b) Zooplankton → phytoplankton → fishes
0%
c) Phytoplankton → zooplankton → fishes
0%
d) Fishes → phytoplankton → zooplankton
Explanation
Answer : (c)
Q.8
Identify 'A' in the following chain: Plant - insect - frog - A - eagle .... .... [C.B.S.E. 2012]
0%
a) Rabbit
0%
b) Parrot
0%
c) Cobra
0%
d) Wolf
Explanation
Answer : (c)
Q.9
In hilly areas, erosion is minimized by .... .... [B.H.U. 1999]
0%
a) Terracing
0%
b) Manuring
0%
c) Ploughing
0%
d) Mixed cropping
Explanation
Answer : (a)
Q.10
Most of the tree dwellers occur in .... ..... [Odisha 2008]
0%
a) Deciduous forest
0%
b) Tropical rain forest
0%
c) Tundra
0%
d) Grassland
Explanation
Answer : (b)
Q.11
Mr X is eating curd/yoghurt. For this he is occupying trophic level .... .... [A.I.I.M.S.2003]
0%
a) First
0%
b) Second
0%
c) Third
0%
d) Fourth
Explanation
Answer : (c)
Q.12
Latex containing plants are classified on the basis of .... .... [M.H.T.C.E.T. 2007]
0%
a) Chemical composition
0%
b) Morphological traits
0%
c) Both A and B
0%
d) None
Explanation
Answer : (c)
Q.13
Well known ecosystem ecologist is .... .... [H.P.P.M.T.2005]
0%
a) P.Maheshwari
0%
b) E.P. Odum
0%
c) M.S. Swaminathan
0%
d) W. Sutherland
Explanation
Answer : (b)
Q.14
Which is mainly responsible for extinction of wildlife? .... .... [C.B.S.E. 1999]
0%
a) Hunting for flesh
0%
b) Destruction of habitats
0%
c) Pollution of air and water
0%
d) All
Explanation
Answer : (d)
Q.15
A food chain can have tropic levels .... .... [M.P.P.M.T.2002]
0%
a) Three or four
0%
b) Three
0%
c) Two
0%
d) One
Explanation
Answer : (a)
Q.16
In an ecosystem, standing crop at any time consists of .... .... [A.M.U. 2012]
0%
a) Total living matter
0%
b) Total detritus
0%
c) Both detritus and living matter
0%
d) Total nutrients
Explanation
Answer : (a)
Q.17
Extinction of a species in a food chain compensated in ..... ..... [C.P.M.T.2007]
0%
a) Ecological pyramid
0%
b) Food web
0%
c) Food chain
0%
d) None
Explanation
Answer : (b)
Q.18
Identify the following food chain: dead animal → blow fly maggots → common frog → snake .... .... [W.B. 2009]
0%
a) Grazing food chain
0%
b) Predator food chain
0%
c) Decomposers food chain
0%
d) Detritus food chain
Explanation
Answer : (d)
Q.19
Forests take part in .... .... [C.P.M.T. 1994]
0%
a) Control of atmospheric pollution
0%
b) Prevention of soil erosion
0%
c) Maintenance of natural balance
0%
d) ALL
Explanation
Answer : (d)
Q.20
Path of energy flow in an ecosystem .... .... [C.P.M.T.2001]
0%
a) Herbivores → producers → carnivores → decomposers
0%
b) Herbivores → carnivores → producers → decomposers
0%
c) Producers → carnivores → herbivores → decomposers
0%
d) Producers → herbivores → carnivores → decomposers
Explanation
Answer : (d)
Q.21
Choose the wrong pair .... .... [Kerala 2007]
0%
a) Salvadora - desert
0%
b) Cenchrus - savanna
0%
c) Tectona - temperate forest
0%
d) Abies - coniferous forest
Explanation
Answer : (c)
Q.22
Clove oil is obtained from .... .... [MP.P.M.T. 2010]
0%
a) Rhizome of vetiveria zizanioides
0%
b) Flower buds of Syzygium aromaticum
0%
c) Leaf of Syzygium aromaticum
0%
d) Wood of santalum album
Explanation
Answer : (b)
Q.23
The accompanying fig represents an ecological pyramid, it is .... .... [A.I.I.M.S. 2005]
0%
a) Pyramid of numbers in grassland
0%
b) Pyramid of numbers in fallow land
0%
c) Pyramid of numbers in lake
0%
d) Energy pyramid in a spring
Explanation
Answer : (c)
Q.24
Which one is a non renewable resource? .... .... [D.P.M.T. 1996]
0%
a) Coal and minerals
0%
b) Plants and cool
0%
c) Water and natural gas
0%
d) Energy and water
Explanation
Answer : (a)
Q.25
Under anaerobic conditions, denitrifying bacterium Pseudomonas changes .... .... [Kerala 2001]
0%
a) Nitrate to molecular nitrogen
0%
b) Nitrate to ammonia
0%
c) Nitrate to nitrite
0%
d) Molecular Nitrate to Nitrate
Explanation
Answer : (a)
Q.26
Percentage of land covered by forests in India is .... .... [A.M.U. 1992]
0%
a) 9 - 18 %
0%
b) 18 - 27 %
0%
c) 27 - 36 %
0%
d) More than 50%
Explanation
Answer : (b)
Q.27
Tropical forests occur in .... .... [C.B.S.E.1994]
0%
a) Jammu and Kashmir
0%
b) Rajasthan
0%
c) Kerala and Assam
0%
d) The forests do not occur in India
Explanation
Answer : (c)
Q.28
One of the following is commonly found in temperate coniferous forest .... .... [Kerala 2009]
0%
a) Shorea rubusta
0%
b) Pinus wallichiana
0%
c) Quercus
0%
d) Prosopis
Explanation
Answer : (b)
Q.29
Sheet erosion is due to .... .... [C.P.M.T. 1990]
0%
a) Fast running rivers
0%
b) Wind
0%
c) Heavy rains
0%
d) Occasional rains
Explanation
Answer : (c)
Q.30
In parasitic food chain, the pyramid of numbers is .... .... [M.P.P.M.T. 2012]
0%
a) Upright
0%
b) Inverted
0%
c) Linear
0%
d) Both A and B
Explanation
Answer : (a)
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