Q.1
Which atom is limiting the primary productivtiy mostly .... .... [Odisha 2008]
  • a) P
  • b) O
  • c) C
  • d) N
Q.2
An agrostological methods of soil conservation is .... .... [K.C.E.T. 2008]
  • a) Terracing
  • b) Mulching
  • c) Basin listing
  • d) Dry farming
Q.3
Biome with broad-leaved resinous fire resistant drought enduring plants is .... .... [A.I.I.M.S.1996]
  • a) Savannah
  • b) Steppes
  • c) Chaparral
  • d) Deciduous forest
Q.4
LP.G. is ? .... .... [A.M.U. 1998]
  • a) Low price gas
  • b) Fossil fuel
  • c) Low pressure gas
  • d) Biogas
Q.5
Alpine forests of Himalayas have .... .... [M.P.P.M.T. 1991]
  • a) Tall evergreen coniferous trees
  • b) Tall board - leaved evergreen trees
  • c) Tall broad - leaved deciduous trees
  • d) Dwarf shrubby plants
Q.6
Zooplanktonic forest are .... .... [M.P.P.M.T.1999]
  • a) Primary producers
  • b) Carnivores
  • c) Primary consumers
  • d) Secondary consumers
Q.7
Ecosystem creates .... .... [M.P.P.M.T.1993]
  • a) Food chains and food web
  • b) Food web
  • c) Habitats
  • d) None of the above
Q.8
In grazing food chain, carnivores are .... ...[Kerala 2011]
  • a) Primary producers
  • b) Secondary producers
  • c) Primary consumers
  • d) Secondary consumers
Q.9
An exhaustible renewable resources is .... ..... [M.H.T.C.E.T. 2009]
  • a) Coal
  • b) Solar energy
  • c) Water
  • d) Petroleum
Q.10
Efficiency of energy transfer from one trophic level to the higher trophic level is called .... .... [E.A.M.C.E.T. 2008]
  • a) Assimilation efficiency
  • b) Exploitation efficiency
  • c) Lindeman's trophic efficiency rule
  • d) Gross primary producers
Q.11
Sequence of species through which organism food passes in a community is called .... ..... [Odisha 2007]
  • a) Food chain
  • b) Ecosystem
  • c) Population
  • d) Ecological pyramid
Q.12
Crop rotation helps in .... .... [B.H.U. 2006]
  • a) Increase in soil fertility
  • b) Decrease in soil fertility
  • c) Decrease in soil erosion
  • d) Decrease water loss
Q.13
Benthos of pond ecosystem are .... .... [E.A.M.C.E.T.1995]
  • a) Producers
  • b) Primary consumers
  • c) Secondary consumers
  • d) Tertiary consumers
Q.14
Seeds of which plant are called "black pearls" .... ..... [Manipur 2009]
  • a) Piper nigrum
  • b) Argemone mexicana
  • c) Elettaria cardamomum
  • d) Coffea arabica
Q.15
During adverse season, therophytes survive through .... .... [C.B.S.E.1997]
  • a) Seeds
  • b) Bulbs
  • c) Rhizomes
  • d) Corms
Q.16
Food wen refers to .... .... [ Chd . C.E.T. 2012]
  • a) Transfer of energy from one to next trophic level
  • b) Unidirectional energy flow
  • c) Capturing solar energy by autotrophs
  • d) Connected feeding patterns in a biotic community
Q.17
Suppose all the bacteria and fungi are destroyed. What will happen .... .... [C.P.M.T.1988]
  • a) There will be no disease and death
  • b) No antibiotics would becme available
  • c) Dead bodies and excretions will pile up
  • d) Soil will become depleted of all nutrients
Q.18
Large woody vines are more commonly found in .... .... [C.B.S.E.2011]
  • a) Tropical rain forests
  • b) Alpine forest
  • c) Temperate forest
  • d) Mangroves
Q.19
Relatively more abundant animals of desert ecosystem are .... ..... [C.B.S.E.1998]
  • a) Arboreal
  • b) Fossorial
  • c) Diurnal
  • d) Aquatic
Q.20
Species diversity is lowest in ecosystem .... .... [Manipal1997]
  • a) Desert
  • b) Tundra
  • c) Grassland
  • d) Deciduous forests
Q.21
Conversion of organic nitrogenous compounds .... ..... [A.M.U.2002]
  • a) Nitrification
  • b) Denitrification
  • c) Ammonification
  • d) Denaturation
Q.22
Soil erosion can be prevented by .... .... [D.P.M.T. 1997]
  • a) Restricted human activity
  • b) Good plant cover
  • c) Checking movement of animals
  • d) Wind screen alone
Q.23
Which pair is mismatched .... .... [C.B.S.E.2005]
  • a) Tundra - permafrost
  • b) Savanna - acacia trees
  • c) Prairie - epiphytes
  • d) Coniferous forest - evergreen trees
Q.24
'Van Mahotsav' was started by .... .... [Har .P.M.T. 2007]
  • a) K.M Munshi
  • b) Sunder Lal Bahuguna
  • c) Vinoba Bhave
  • d) J.L Nehru
Q.25
Biotic components of an ecosystem include .... .... [C.P.M.T.1991]
  • a) Producers, consumers and decomposes
  • b) Producers, consumers
  • c) Producers only
  • d) Consumers only
Q.26
Secondary producers are .... ..... [A.M.U.1999]
  • a) Herbivores
  • b) Heterotrophs
  • c) Carnivores
  • d) Green plants
Q.27
Which one has the maximum biomass .... .... [Odisha 2004]
  • a) Temperature
  • b) Tropical rain forest
  • c) Alpine vegetation
  • d) Taiga
Q.28
Study statements (a - d) and select two correct ones a. A lion eating a deer and a sparrow feeding on grain are consumers b. Predator star fish, pisaster, helps in maintaining species diversity of some invertebrates c. Predators ultimately lead to extinction of prey species d. Plant chemical like nicotine and strychnine are produced due to metabolic disorders C.B.S.E. 2010
  • a) c and d
  • b) a and d
  • c) a and b
  • d) b and c
Q.29
Which one is detritus food chain? .... .... [D.P.M.T. 2008]
  • a) Grass → insects → snakes
  • b) Plankton → small fish → large fish
  • c) Organic matter → bacteria → molluscs
  • d) All the above
Q.30
Maximum biomass of autotrophs in oceans is made up of .... .... [A.F.M.C.2007]
  • a) Benthic brown algae, coastal red algae and daphnids
  • b) benthic diatoms and marine viruses
  • c) Sea grasses and slime moulds
  • d) Free floating microalgae, cyanobacteria and nanoplankton
0 h : 0 m : 1 s