Q.1
Ecological pyramids are of types .... .... [M.P.P.M.T.1997]
  • a) Two
  • b) Three
  • c) Four
  • d) Five
Q.2
Energy enters a food chain through ..... ..... [C.P.M.T.2003]
  • a) Producers
  • b) Decomposer
  • c) Herbivores
  • d) Carnivores
Q.3
Decreased rainfall in northern areas is due to ..... .... [D.P.M.T. 1996]
  • a) Changes in sun
  • b) Global phenomenon
  • c) Deforestation in catchment areas
  • d) Deforestation in evaporating area near equator
Q.4
Transfer of energy is different trophic levels of an ecosystem is .... .... C.E.T.Chd.1997
  • a) Bioenergetics
  • b) Biosystem
  • c) Geobiocoenosis
  • d) Holocoenosis
Q.5
In a pyramid of biomass, primary producers have a dry biomas of 809 kg/m2.The biomass at tertiary consumer level would be .... .... [ A.M.U. 2012]
  • a) 37 kg/m2
  • b) 11 kg/m2
  • c) 5 kg/m2
  • d) 1.5 kg/m2
Q.6
Ecosystem is .... ..... [Odisha 2005]
  • a) Always open
  • b) Always closed
  • c) Both open and closed depending upon community
  • d) Both open and closed depending upon biomass
Q.7
Which one is non renewable energy source? .... .... [H.P.P.M. 2005]
  • a) Hydropower
  • b) Tidal power
  • c) Geothermal power
  • d) Nuclear energy
Q.8
Tropical forests are denser due to .... .... [C.P.M.T.2002]
  • a) wild animals
  • b) High temperature and less rainfall
  • c) Low temperature and excess rain
  • d) High temperature and high rainfall
Q.9
Most economical and effective method of control of soil pH is application of .... .... [A.M.U. 2011]
  • a) CaCO3
  • b) Ca(OH)2
  • c) CaCl2
  • d) Ca(NO3)2
Q.10
Which occupies more than one trophic level in the same ecosystem at the same time ... .... [C.B.S.E.2011]
  • a) Sparrow
  • b) Goat
  • c) Frog
  • d) Lion
Q.11
In a food chain, herbivores/deer/grasshoppers are .... .... [M.P.P.M.T.2002]
  • a) Primary producers
  • b) Primary consumers
  • c) Secondary consumers
  • d) Decomposers
Q.12
Detritus food chain begins with .... .... [Odisha 2007]
  • a) Bacteria
  • b) Viruses
  • c) Algae
  • d) Protozoa
Q.13
An ammonifying bacteria is .... ..... [A.M.U.2002]
  • a) Clostridium
  • b) Azotobacter
  • c) Nitrosococcus
  • d) Bacillus ramosus
Q.14
The most stable ecosystem is .... .... [B.H.U.2002]
  • a) Forest
  • b) Moutain
  • c) Desert
  • d) Ocean
Q.15
Which is not functional unit of an ecosystem .... .... [C.B.S.E. 2012]
  • a) Productivity
  • b) Decomposition
  • c) Energy flow
  • d) Stratification
Q.16
Nitrogen is a critical element of the ecosystem because it is .... ..... [B.H.U.1996]
  • a) Essential element
  • b) Abundant in atmosphere
  • c) Labile
  • d) Fixed by microbes
Q.17
Clove oil is got from .... .... [Odisha 2009]
  • a) Crocus sativa
  • b) Zingiber officinale
  • c) Curcuma
  • d) Syzygium aromaticum
Q.18
In a biotic community, the most important factor for survival of an animals is .... .... [R.P.M.T.2006]
  • a) Day length
  • b) Soil moisture
  • c) Green food
  • d) Predators
Q.19
During summer khas khas mats used for cooling air are prepared from roots of .... .... [M.P.P.M.T. 2010]
  • a) Saccharum munja
  • b) Bambusa nana
  • c) Vetiveria zizanioides
  • d) Setaria pumila
Q.20
Standing crop is .... .... [J.K.C.M.E.E. 2011]
  • a) All photosynthetic living forms of an area
  • b) Amount of living matter in a component of population at any time
  • c) All living forms
  • d) All crops plants in an area
Q.21
Nepenthes belongs to the category of .... .... [C.P.M.T.1990]
  • a) Primary consumer
  • b) Producer
  • c) secondary consumer
  • d) Both B and C
Q.22
Controlling factor in ecosystem is .... ..... [C.E.T.Chd2000]
  • a) Soil moisture
  • b) Food
  • c) Predation
  • d) Temperature
Q.23
Which one is nature's cleaner? .... ..... [Pb.PM.T.1997]
  • a) Consumers
  • b) Producers
  • c) Decomposers and scavengers
  • d) Symbionts
Q.24
Major communities of the world are .... ..... [B.H.U.1996]
  • a) Scrubs, jungles and gardens
  • b) Ocean, fresh water and forest communities
  • c) Grassland and desert communities
  • d) Both B and C
Q.25
Deforestation will decrease ..... ..... [C.B.S.E. 1990[
  • a) Soil erosion
  • b) Land slides
  • c) Soil fertility
  • d) Rainfall
Q.26
The importance of ecosystem lies in .... ..... [C.P.M.T. 1990]
  • a) Cycling of materials
  • b) Flow of energy
  • c) Both A and B
  • d) Its biomass
Q.27
Broad-leaves oaks are found in .... .... [A.F.M.C.2004]
  • a) Tropical evergreen forest
  • b) Temperate deciduous forest
  • c) North coniferous forest
  • d) Tropical deciduous forest
Q.28
Carnivores represent .... ..... [M.P.P.M.T.1993]
  • a) Primary consumers
  • b) Secondary and tertiary consumers
  • c) Secondary consumers
  • d) Reducers
Q.29
Animals like Mice, Lizards and Cockroach share their habitat with human dwellings. They are .... .... [Kerala 2001]
  • a) Inquilines
  • b) Cultigens
  • c) Transplants
  • d) Humus
Q.30
Moderate rain during summer produces .... .... [A.I.I.M.S.1998]
  • a) Desert
  • b) Grassland
  • c) Scrub forest
  • d) Deciduous forest
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