Q.1
Sea weed belongs to trophic level .... .... [C.M.C.2002]
  • a) Primary consumer
  • b) Secondary consumer
  • c) Decomposer
  • d) Primary producer
Q.2
Pedology refers to study of .... .... [J.K.C.M.E.E. 2011]
  • a) Soil
  • b) Population
  • c) Fossils
  • d) Water
Q.3
Estuaries are highly productive as they are nutrient trap due to mixing of .... .... [D.P.M.T.2007]
  • a) Ocean and pond
  • b) Lake and river
  • c) Pond and lake
  • d) River and sea water
Q.4
Mineral nodules present in ocean which can meet shortage of important soil nutrient are
  • a) Manganese nodules
  • b) Phosphorite nodules
  • c) Magnesium nodules
  • d) All of the above
Q.5
Which one is sedimentary cycle? .... .... [H.P.P.M.T.2012]
  • a) Oxygen cycle
  • b) Nitrogen cycle
  • c) Carbon cycle
  • d) Phosphorus cycle
Q.6
Match the items .... .... [K.C.E.T.1999]
a. grass p. decomposer
b. grasshopper q. secondary carnivore
c frog r. producer
d. hawk s. primary consumer
- -   - - t. primary carnivore
  • a) a - r, b - p, c - t, d - s
  • b) a - p, b - r, c - s, d - t
  • c) a - r, b - t, c - s, d - q
  • d) a - r, b - s, c - t, d – q
Q.7
In an ecosystem, which one shows one-way passage .... .... [PbP.M.T.1999]
  • a) Free energy
  • b) Carbon
  • c) Nitrogen
  • d) Potassium
Q.8
Taiga occurs in .... .... [A.F.M.C.2009]
  • a) Tropical area
  • b) Subtropical areas
  • c) Arctic region
  • d) North temperate area
Q.9
Soil erosion is prevented by .... .... [D.P.M.T. 1999]
  • a) Afforestation
  • b) Increased bird population
  • c) Overgrazing
  • d) Removal of vegetation
Q.10
Pick up the correct food chain .... ..... [C.B.S.E.1991]
  • a) Grass → Chameleon → insect → bird
  • b) Grass → fox → rabbit → bird
  • c) Phytoplankton → zooplankton → fish
  • d) Fallen leaves → bacteria → insect larvae
Q.11
In upright pyramid of biomass, herbivores occupy the position .... .... [C.P.M.T.2000]
  • a) 1
  • b) 2
  • c) 3
  • d) 4
Q.12
Biogas is combustive as it contains .... .... [B.H.U. 2005]
  • a) CO2
  • b) CH4
  • c) H2
  • d) H2S
Q.13
Maximum number in pond/grass ecosystem is of .... ..... [Kerala 2007]
  • a) Producers
  • b) Consumers
  • c) Top consumers
  • d) Decomposers
Q.14
Maximum productivity is shown by .... .... [M.P.P.M.T. 1988]
  • a) Forests
  • b) Aquatic ecosystems
  • c) Deserts
  • d) Grasslands
Q.15
Tropical rain forest are found in .... .... [B.H.U. 1998]
  • a) Andamans
  • b) Bihar
  • c) Himachal Pradesh
  • d) Jammu and Kashmir
Q.16
Lentic ecosystem occurs in .... .... [Pb.P.M.T.2007]
  • a) Rain water
  • b) Running water
  • c) Standing water
  • d) Gravitational water
Q.17
Species diversity increases as one proceeds from .... .... [C.B.S.E.1994]
  • a) High altitude to low altitude and high latitude to low latitude
  • b) Low altitude to high altitude and high latitude to low latitude
  • c) Low altitude to high altitude and low latitude to high latitude
  • d) High altitude to high altitude and low latitude to high latitude
Q.18
In which regions of the world are hot deserts located .... .... [ Guj .C.E.T. 2011]
  • a) Equator and Tropic of Cancer
  • b) Equator and Tropic of Capricorn
  • c) Polar region
  • d) Tropic of Cancer and Tropic of Capricorn
Q.19
Largest amount of fresh water is found in .... .... [C.B.S.E. 1994]
  • a) Lakes and streams
  • b) Underground
  • c) Polar ice and glaciers
  • d) Rivers
Q.20
Deserts, grasslands, forests and tundra are examples of .... .... [D.P.M.T. 2009]
  • a) Biomes
  • b) Ecosystems
  • c) Biosphere
  • d) Biogeographical regions
Q.21
Great Barrier Reef along east coast of Australia is a .... .... [A.I.I.M.S.2008]
  • a) Population
  • b) Community
  • c) Biome
  • d) Ecosystem
Q.22
Chewing gum is produced by .... .... [Odisha 2009]
  • a) Prunus
  • b) Achras sapota
  • c) Cajanus
  • d) Cocos
Q.23
Value of a resources is dependent on its .... .... [A.I.I.M.S. 1989]
  • a) Quality
  • b) Quantity
  • c) Requirement and type of society
  • d) All
Q.24
The wildlife act 1972 was first amended in .... .... [D.P.M.T. 2010]
  • a) 1991
  • b) 1995
  • c) 2001
  • d) 2007
Q.25
Amount of nitrogen fixed electrochemically and photochemically is .... .... [Kerala2000]
  • a) 140 mg/m2/yr
  • b) 35 mg/m2/yr
  • c) 15 mg/m2/yr
  • d) 350 mg/m2/yr
Q.26
Which is correct about GPP and NPP in ecosystem ..... .... [B.H.U. 2012]
  • a) NPP = GPP - plant respiration
  • b) NPP = GPP + Animal respiration
  • c) NPP = GPP - Animal respiration
  • d) NPP = GPP + plant respiration
Q.27
In a food chain, the largest population is that of .... ..... [C.B.S.E.1994]
  • a) Producers
  • b) Decomposers
  • c) Secondary consumers
  • d) Primary consumers
Q.28
Number of individuals decreases from producer level to consumer level in .... .... [J.K.C.M.E.E. 2010]
  • a) Pyramid of numbers
  • b) Pyramid of energy
  • c) Pyramid of biomass
  • d) None
Q.29
Fuel wood crisis can be overcome by .... .... [E.A.M.C.E.T.1999]
  • a) Better wooden stoves
  • b) Efficient wood extraction
  • c) Greater afforestation
  • d) Using alternate energy source
Q.30
Maximum energy amongst ecosystem is contributed by .... .... [C.E.T.Chd. 2009]
  • a) Forests
  • b) Crops
  • c) Corals
  • d) Fuel gas
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