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