Q.1
Loss of energy from one tropic level to next higher tropic level is .... .... [A.M.U.2010]
  • a) 30%
  • b) 40%
  • c) 60%
  • d) 90%
Q.2
The major forest type found in India is .... .... [PbP.M.T.2003]
  • a) Subtropical deciduous
  • b) Tropical moist deciduous
  • c) Tropical deciduous
  • d) Temperature deciduous
Q.3
Tropical dry deciduous forests occur in India in .... .... [M.P.P.M.T.1996]
  • a) Andamans
  • b) Eastern Himalayas
  • c) Madhya Pradesh
  • d) Kerala
Q.4
Which one is not a natural factor for causing soil erosion .... .... [C.O.M.E.D.-K’s 2011]
  • a) Gullying
  • b) Clips
  • c) Rilling
  • d) Deforestation
Q.5
Importance of ecosystem lies in .... .... [Har .P.M.T.1994]
  • a) Cycling of materials
  • b) Flow of energy
  • c) Both A and B
  • d) None
Q.6
Prolonged liberal irrigation of agricultural fields is likely to create problem of .... .... [C.B.S.E2005]
  • a) Acidity
  • b) Alkalinity
  • c) Salinity
  • d) Metal toxicity
Q.7
Which one lie at the level of primary consumers? .... .... [K.C.E.T.2004]
  • a) Fishes
  • b) Eagles
  • c) Cattle and insects
  • d) Snakes and frogs
Q.8
Uniform soil erosion by running water is .... .... [B.H.U.2001]
  • a) Gully erosion
  • b) Rill erosion
  • c) Riparian erosion
  • d) Sheet erosion
Q.9
Possibility of coal in area is guessed through .... .... [M.P.P.M.T. 1998 ]
  • a) Mining the area
  • b) Economic survey
  • c) Pollen grain analysis
  • d) Ecology of the area
Q.10
In an ecosystem, trophic level of man is .... .... [A.I.I.M.S.1999]
  • a) Producer
  • b) Herbivore
  • c) Omnivores
  • d) carnivore
Q.11
Match the following. .... .... [Manipal 2002 ]
a. western Ghats (i) western and eastern Himalayas
b. estuarine ecosystem (ii) Rajasthan,Punjab and parts of Gujarat
c. Indus plain (iii) west Bengal and Andaman
d. arctic zone (iv) cape Comorin
  • a) a - iv, b - ii, c - iii, d - i
  • b) a - iv, b - iii, c - ii, d - i
  • c) a - i, b - ii, c - iii, d - iv
  • d) a - iii, b- iv, c - ii, d –i
Q.12
Slow rate of decomposition of fallen logs in nature is due to .... ..... [ C.B.S.E. 2008]
  • a) Anaerobic environment around them
  • b) Low cellulose contents
  • c) Low moisture contents
  • d) Poor nitrogen contents
Q.13
In energy ecosystem/food chain, the green plants are .... .... [C.B.S.E.1996]
  • a) Decomposers
  • b) Producers
  • c) Consumers
  • d) None
Q.14
Fossil fuel have been formed by a .... .... [D.P.M.T. 1996]
  • a) Conventional process
  • b) Natural process
  • c) Non – conventional process
  • d) All
Q.15
Biochemical cycle with gases phase is .... .... [D.P.M.T.2001]
  • a) Carbon
  • b) Sodium
  • c) Phosphorus
  • d) Magnesium
Q.16
Multinational source of energy is .... .... [C.B.S.E. 1999]
  • a) Soil
  • b) Water
  • c) Sun
  • d) None
Q.17
The most favoured habitat of a plant is called .... .... [J.I.P.M.E.R.1999]
  • a) Ecological habitat
  • b) Microhabitat
  • c) Ecotype
  • d) Ecocline
Q.18
Rhizophora occurs in .... .... [Odisha 2004]
  • a) Tropical rain forest
  • b) Tropical deciduous forest
  • c) Mangroves
  • d) Both a And b.
Q.19
Terracing helps in soil conservation in .... .... [C.P.M.T 2002]
  • a) Plains
  • b) Deserts
  • c) Hilly areas
  • d) Wet areas
Q.20
First link in food chain is green because .... .... [M.P.P.M.T.2000]
  • a) It alone can synthesis food
  • b) It is fixed at one place
  • c) It can pick up everything
  • d) It can eat everything
Q.21
Find out the odd one in nitrogen cycle .... .... [Guj C.E.T 2008]
  • a) Pseudomonas
  • b) Clostridium
  • c) Nostoc
  • d) Rhizobium
Q.22
Under Eltonian pyramid, lion is kept under .... .... [Bih .P.M.T. 2004]
  • a) Primary consumer
  • b) Secondary consumer
  • c) Tertiary consumer
  • d) Producers
Q.23
Primary productivity of the ecosystem is most often limited by .... ..... [Odisha 2009]
  • a) Oxygen
  • b) Nitrogen
  • c) Solar radiation
  • d) Consumers
Q.24
Resin and turpentine are obtained from .... .... [M.P.P.M.T. 2010]
  • a) Cedrus
  • b) Abies
  • c) Pinus
  • d) Eucalyptus
Q.25
The limiting factor in soil nitrification is . ... [A.I.I.M.S.2000]
  • a) Soil pH
  • b) Light
  • c) Temperature
  • d) Air
Q.26
A renewable resource is .... .... [Manipal 2001]
  • a) Fossil fuel
  • b) Metals
  • c) Sunlight
  • d) Both a And b
Q.27
In grass-deer-tiger food chain, grass biomass is one tone.The tiger biomass shall be .... .... [R.P.M.T.2006]
  • a) 100 kg
  • b) 10 kg
  • c) 200 kg
  • d) 1 kg
Q.28
Which is man made ecosystem? .... .... [W.B. 2009]
  • a) Herbarium
  • b) Tissue culture
  • c) Forest
  • d) Aquarium
Q.29
Useful product of Rauwolfia serpentina .... .... [Wardha 2003]
  • a) Rauwolfia
  • b) Serpentina
  • c) Reserpine
  • d) Tannin
Q.30
An ecosystem with little primary productivity is .... .... [Odisha 2008]
  • a) Forest
  • b) River
  • c) Sea
  • d) Grassland
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