Q.1.
Which of the following communities are more vulnerable to invasion by outside animas and plants? .... .... [Pb.P.M.T. 2005]
-
0%
a) Tropical forest
-
100%
b) Mangrove
-
0%
c) Temperate forest
-
0%
d) Oceanic island communities
Q.2.
Rate of conversion of light does not possess rhizobium containing nodules .... .... [J.K.C.M.E.E.2003]
-
0%
a) Net primary productivity
-
0%
b) Gross primary productivity
-
100%
c) Net secondary productivity
-
0%
d) Gross secondary productivity
Q.3.
Source of maximum sulphur is/reservoir of sulphur is .... .... [Manipal 2004]
-
0%
a) Ocean
-
50%
b) Lakes
-
0%
c) Land
-
50%
d) Rocks
Q.4.
Main renewable source of energy .... .... [C.P.M.T. 1992]
-
0%
a) Forest
-
100%
b) Fuel gas
-
0%
c) Cattle
-
0%
d) Coal
Q.5.
Who proposed the term ecosystem? .... .... [B.H.U.2007]
-
0%
a) Odum
-
0%
b) Gardner
-
0%
c) Warming
-
100%
d) Tansley
Q.6.
Biomass available for consumers and rate of formation of new organic matter by consumers are .... .... [Kerala 2012]
-
0%
a) Gross primary productivity and net primary productivity
-
100%
b) Net primary productivity and gross primary productivity
-
0%
c) Gross primary productivity and secondary productivity
-
0%
d) Net primary productivity and secondary productivity
Q.7.
Which is correct food chain .... .... [A.M.U.2001]
-
0%
a) Phytoplankton → fishes → zooplankton
-
100%
b) Zooplankton → phytoplankton → fishes
-
0%
c) Phytoplankton → zooplankton → fishes
-
0%
d) Fishes → phytoplankton → zooplankton
Q.8.
Identify 'A' in the following chain: Plant - insect - frog - A - eagle .... .... [C.B.S.E. 2012]
-
0%
a) Rabbit
-
100%
b) Parrot
-
0%
c) Cobra
-
0%
d) Wolf
Q.9.
In hilly areas, erosion is minimized by .... .... [B.H.U. 1999]
-
0%
a) Terracing
-
50%
b) Manuring
-
0%
c) Ploughing
-
50%
d) Mixed cropping
Q.10.
Most of the tree dwellers occur in .... ..... [Odisha 2008]
-
0%
a) Deciduous forest
-
0%
b) Tropical rain forest
-
100%
c) Tundra
-
0%
d) Grassland
Q.11.
Mr X is eating curd/yoghurt. For this he is occupying trophic level .... .... [A.I.I.M.S.2003]
-
0%
a) First
-
100%
b) Second
-
0%
c) Third
-
0%
d) Fourth
Q.12.
Latex containing plants are classified on the basis of .... .... [M.H.T.C.E.T. 2007]
-
0%
a) Chemical composition
-
0%
b) Morphological traits
-
0%
c) Both A and B
-
0%
d) None
Q.13.
Well known ecosystem ecologist is .... .... [H.P.P.M.T.2005]
-
0%
a) P.Maheshwari
-
0%
b) E.P. Odum
-
0%
c) M.S. Swaminathan
-
0%
d) W. Sutherland
Q.14.
Which is mainly responsible for extinction of wildlife? .... .... [C.B.S.E. 1999]
-
0%
a) Hunting for flesh
-
0%
b) Destruction of habitats
-
0%
c) Pollution of air and water
-
0%
d) All
Q.15.
A food chain can have tropic levels .... .... [M.P.P.M.T.2002]
-
0%
a) Three or four
-
0%
b) Three
-
0%
c) Two
-
0%
d) One
Q.16.
In an ecosystem, standing crop at any time consists of .... .... [A.M.U. 2012]
-
0%
a) Total living matter
-
0%
b) Total detritus
-
0%
c) Both detritus and living matter
-
0%
d) Total nutrients
Q.17.
Extinction of a species in a food chain compensated in ..... ..... [C.P.M.T.2007]
-
0%
a) Ecological pyramid
-
0%
b) Food web
-
0%
c) Food chain
-
0%
d) None
Q.18.
Identify the following food chain: dead animal → blow fly maggots → common frog → snake .... .... [W.B. 2009]
-
0%
a) Grazing food chain
-
0%
b) Predator food chain
-
0%
c) Decomposers food chain
-
0%
d) Detritus food chain
Q.19.
Forests take part in .... .... [C.P.M.T. 1994]
-
0%
a) Control of atmospheric pollution
-
0%
b) Prevention of soil erosion
-
0%
c) Maintenance of natural balance
-
0%
d) ALL
Q.20.
Path of energy flow in an ecosystem .... .... [C.P.M.T.2001]
-
0%
a) Herbivores → producers → carnivores → decomposers
-
0%
b) Herbivores → carnivores → producers → decomposers
-
0%
c) Producers → carnivores → herbivores → decomposers
-
0%
d) Producers → herbivores → carnivores → decomposers
Q.21.
Choose the wrong pair .... .... [Kerala 2007]
-
0%
a) Salvadora - desert
-
0%
b) Cenchrus - savanna
-
0%
c) Tectona - temperate forest
-
0%
d) Abies - coniferous forest
Q.22.
Clove oil is obtained from .... .... [MP.P.M.T. 2010]
-
0%
a) Rhizome of vetiveria zizanioides
-
0%
b) Flower buds of Syzygium aromaticum
-
0%
c) Leaf of Syzygium aromaticum
-
0%
d) Wood of santalum album
Q.23.
The accompanying fig represents an ecological pyramid, it is .... .... [A.I.I.M.S. 2005]
-
0%
a) Pyramid of numbers in grassland
-
0%
b) Pyramid of numbers in fallow land
-
0%
c) Pyramid of numbers in lake
-
0%
d) Energy pyramid in a spring
Q.24.
Which one is a non renewable resource? .... .... [D.P.M.T. 1996]
-
0%
a) Coal and minerals
-
0%
b) Plants and cool
-
0%
c) Water and natural gas
-
0%
d) Energy and water
Q.25.
Under anaerobic conditions, denitrifying bacterium Pseudomonas changes .... .... [Kerala 2001]
-
0%
a) Nitrate to molecular nitrogen
-
0%
b) Nitrate to ammonia
-
0%
c) Nitrate to nitrite
-
0%
d) Molecular Nitrate to Nitrate
Q.26.
Percentage of land covered by forests in India is .... .... [A.M.U. 1992]
-
0%
a) 9 - 18 %
-
0%
b) 18 - 27 %
-
0%
c) 27 - 36 %
-
0%
d) More than 50%
Q.27.
Tropical forests occur in .... .... [C.B.S.E.1994]
-
0%
a) Jammu and Kashmir
-
0%
b) Rajasthan
-
0%
c) Kerala and Assam
-
0%
d) The forests do not occur in India
Q.28.
One of the following is commonly found in temperate coniferous forest .... .... [Kerala 2009]
-
0%
a) Shorea rubusta
-
0%
b) Pinus wallichiana
-
0%
c) Quercus
-
0%
d) Prosopis
Q.29.
Sheet erosion is due to .... .... [C.P.M.T. 1990]
-
0%
a) Fast running rivers
-
0%
b) Wind
-
0%
c) Heavy rains
-
0%
d) Occasional rains
Q.30.
In parasitic food chain, the pyramid of numbers is .... .... [M.P.P.M.T. 2012]
-
0%
a) Upright
-
0%
b) Inverted
-
0%
c) Linear
-
100%
d) Both A and B
Explanation
