Q.1
Bacteria and fungi are .... .... [C.P.M.T.2003]
  • a) Scavengers
  • b) Primary consumers
  • c) Secondary consumers
  • d) Decomposers
Q.2
Pseudomonas is an important component of nitrogen cycle. It .... ....
  • a) Fixes elemental nitrogen
  • b) Produces elemental nitrogen
  • c) Transfers nitrogen
  • d) Changes ammonium nitrogen to nitrate state
Q.3
The trophic level of herbivores animal is ..... ..... [Pb.P.M.T.2003]
  • a) First
  • b) Second
  • c) Third
  • d) intermediate
Q.4
Ultimate source of energy for living beings is .... .... [C.P.M.T.2001]
  • a) Carbohydrates
  • b) Fats
  • c) Sunlight
  • d) ATP
Q.5
An ecosystem does not normally alter because it is an state of .... ..... [A.F.M.C.1997]
  • a) Homeostasis
  • b) Imbalance
  • c) Deficient light
  • d) Deficient components
Q.6
An ecosystem contains .... .... [D.P.M.T.1999]
  • a) Producers
  • b) Consumers
  • c) decomposers
  • d) All the above
Q.7
The pyramid which cannot be inverted in a stable ecosystems is that of .... ..... [B.H.U.2008]
  • a) Biomass
  • b) Number
  • c) Energy
  • d) All the above
Q.8
Rate of storage of organic matter not used by heterotrophs is termed as .... ....
  • a) Net productivity
  • b) Net primary productivity
  • c) Gross primary productivity
  • d) Secondary productivity
Q.9
Pollution from animals excreta and organic waste from kitchen can most probably minimized by .... .... [A.I.I.MS. 2006]
  • a) Storing the in underground storage tanks
  • b) Using them producing biogas
  • c) Vermiculture
  • d) Using them directly as biofertilizers
Q.10
Energy store at the consumer level is .... ..... [M.P.P.M.T.2001]
  • a) Gross primary productivity
  • b) net primary productivity
  • c) Net productivity
  • d) Secondary productivity
Q.11
Choose the correct sequence .... ..... [Manipal 2002]
  • a) Phytoplankton → fishes → zooplankton → crustaccean
  • b) Zooplankton → phytoplankton → crustaccean → fishes
  • c) Phytoplankton → zooplankton → crustaccean → fishes
  • d) Fishes → crustaccean → phytoplankton → zooplankton
Q.12
More than 70% of world’s fresh water is contained in .... .... [C.B.S.E 2005]
  • a) Polar ice
  • b) Antarctica
  • c) Green land
  • d) Glaciers and mountains
Q.13
Best source of renewable energy is .... .... [M.P.P.M.T.1995]
  • a) Cattle
  • b) Petroleum
  • c) Coal
  • d) Trees
Q.14
Minerals and metals are .... .... [C.B.S.E. 1992]
  • a) Biodegradable resources
  • b) Renewable
  • c) Nonrenewable
  • d) Renewable and nonrenewable resources
Q.15
Relative to roots, the shoots are massive in plants of .... .... [C.P.M.T. 1992]
  • a) Desert
  • b) Moist temperature
  • c) Tundra
  • d) Moist tropical forests
Q.16
Tip of an ecological pyramid is occupied by .... .... [M.P.P.M.T.1999]
  • a) Predator
  • b) herbivores
  • c) Carnivores
  • d) None
Q.17
Tropical plants prosopis, acacia and capparis .... .... [C.B.S.E.1998]
  • a) Evergreen forest
  • b) Deciduous forest
  • c) Grassland
  • d) Thorn forest
Q.18
In ecosystem, cycling of nutrients is called .... ... [A.M.U.2010]
  • a) Geological cycle
  • b) Biogeochemical cycle
  • c) Geochemical cycle
  • d) Chemical cycle
Q.19
Supply of oxygen to biogas plant will cause
  • a) Positive effect
  • b) Negative effect
  • c) No effect
  • d) None
Q.20
Frog feeding on herbivorous insect is ..... ..... [C.B.S.E.2000]
  • a) Primary consumer
  • b) Secondary consumer
  • c) Tertiary consumer
  • d) Top carnivore
Q.21
Afforestation in relation to urban development is component of .... .... [Pb .PM.T. 2000]
  • a) Social forestry
  • b) Integrated forest development
  • c) Agroforestry
  • d) Fuel forestry
Q.22
Highest value in g/m2/yr of a grassland ecosystem would be .... .... [C.B.S.E.2004]
  • a) Gross primary production
  • b) ssNet primary production
  • c) Secondary production
  • d) Tertiary production
Q.23
Pyrolysis of wood occurs in .... .... [M.H.T.C.E.T.2007]
  • a) Presence of air
  • b) Absence of air
  • c) Limited supply of air
  • d) Both B and C
Q.24
Major fuel content of biogas is .... .... [C.B.S.E. 2004]
  • a) CO
  • b) CO2
  • c) CH4
  • d) CH3
Q.25
The forest that colours in autumn is .... ..... [C.P.M.T.1992]
  • a) Temperate evergreen forest
  • b) Temperate deciduous forest
  • c) Tropical evergreen forest
  • d) Tropical deciduous forest
Q.26
which is not recycled in ecosystem .... ..... [B.H.U. 2012]
  • a) Nitrogen
  • b) Water
  • c) Energy
  • d) Oxygen
Q.27
Types of food chains are .... .... [M.P.P.M.T.2001]
  • a) Four
  • b) Three
  • c) Two
  • d) Six
Q.28
Biodiesel is got from .... .... [Odisha 2006]
  • a) Cedrus
  • b) Jatropha biloba
  • c) Jatropha curcas
  • d) None
Q.29
Wildlife (Protection) Act of India was enacted in .... .... [Odisha 2003]
  • a) 1952
  • b) 1962
  • c) 1972
  • d) 1982
Q.30
Food chain in which microorganisms breakdown the food formed by primary producers is ..... ..... [C.B.S.E.1991]
  • a) Parasitic food chain
  • b) Detritus food chain
  • c) Consumer food chain
  • d) Predator food chain
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