Source of energy in ecosystem is .... .... [C.P.M.T.2002]
40%
a) Sun
20%
b) Sugar produced in photosynthesis
0%
c) Green plants
40%
d) ATP
Q.2.
Percentage of precipitation that can be stored in dams of India is .... .... [D.P.M.T 2009]
0%
a) 10
33%
b) 18
67%
c) 43
0%
d) 55
Q.3.
A rat feeding on potato tuber is .... .... [K.C.E.T.1999]
33%
a) Producer
33%
b) Primary consumer
33%
c) Carnivore
0%
d) Decomposer
Q.4.
Least porous soil is .... .... [D.P.M.T 2009]
0%
a) Silt soil
25%
b) Peat soil
25%
c) Clay soil
50%
d) Loam soil
Q.5.
An ecosystem is .... .... [M.P.PM.T.1992]
100%
a) Different communities of plants, animals and microbes together with their physico-chemical environments
0%
b) Different communities of plants and microbes alongwith their physico-chemical environments.
0%
c) A localized assemblage of several plants and animals
0%
d) An assemblage of plants, animals and their surroundings
Q.6.
Energy enters an ecosystem through ..... .... [C.P.M.T.1998]
0%
a) Herbivores
100%
b) Producers
0%
c) Carnivores
0%
d) Decomposers
Q.7.
Pyramid of energy is .... .... [A.M.U.2010]
0%
a) Always inverted
50%
b) Always upright
0%
c) Spindle-shaped
50%
d) Both upright and inverted depending upon ecosystem
Q.8.
The upright pyramid of number is absent in ... ... [C.B.S.E. 2012]
50%
a) Lake
0%
b) Forest
50%
c) Grassland
0%
d) Pond
Q.9.
Crop rotation is employed for .... .... [C.P.M.T.2003]
100%
a) Increasing nitrogen content of soil
0%
b) Checking soil erosion
0%
c) Community development
0%
d) Enhancing soil fertility
Q.10.
Sidartha found a vegetarian fields mouse being swallowed by snake which in turn formed the meal for a hawk. what is the position of snake in the food chain? .... .... [C.P.M.T.1990]
0%
a) Producer
0%
b) Primary consumer
0%
c) secondary consumer
100%
d) tertiary consumer
Q.11.
Phytoplankton is component of .... .... [Bihar.P.M.T.2001]
100%
a) Pond ecosystem
0%
b) Desert ecosystem
0%
c) Grass ecosystem
0%
d) Forest ecosystem
Q.12.
Highest annual net primary productivity is of .... .... [M.P.P.M.T.2010]
0%
a) Tropical deciduous forests
100%
b) Temperate evergreen forest
0%
c) Temperate deciduous forest
0%
d) Tropical rain forest
Q.13.
Most primary productivity of pond is by .... ..... [Manipal 2004]
100%
a) Phytoplankton
0%
b) Zooplankton
0%
c) Floating plants
0%
d) Red algae
Q.14.
Percentage of forest cover recommended by National Forest Policy (1988) is .... .... [Kerala 2009]
0%
a) 30% in plains, 60% in hills
100%
b) 20% in plains, 70% in hills
0%
c) 33% in plains, 67% in hills
0%
d) 37% in plains, 67% in hills
Q.15.
CO2 and O2 balance in atmosphere is due to .... .... [Bih.P.M.T.1995]
100%
a) Photosynthesis
0%
b) Respiration
0%
c) Leaf anatomy
0%
d) Photorespiration
Q.16.
Bioindicators are used for knowing .... .... [M.P.P.M.T. 2007]
0%
a) Minerals
0%
b) Oxygen demand
0%
c) Air pollution
100%
d) All
Q.17.
Stability of ecosystem depends upon .... ..... [C.P.M.T.2007]
0%
a) Primary productivity
0%
b) Number of producers
0%
c) Number of consumers
100%
d) Interchange between producers and consumers
Q.18.
If CO2 is removed totally from the biosphere which organisms will be affected first .... .... [Manipur 2009]
0%
a) Consumers
0%
b) Secondary consumers
100%
c) Producers
0%
d) Primary producers
Q.19.
A characteristic of mangroves is .... .... [A.M.U.2003]
0%
a) Vivipary
100%
b) Pneumatophores
0%
c) Supporting roots
0%
d) All
Q.20.
Which communities are more vulnerable to invasion by outside plants and animals? .... ..... [C.B.S.E. 1998]
0%
a) Tropical evergreen forests
0%
b) Temperate forests
100%
c) Mangroves
0%
d) Oceanic island communities
Q.21.
In food web, hyenas and vultures are .... .... [M.P.P.M.T.2004]
100%
a) Primary consumers
0%
b) Predators
0%
c) Scavengers
0%
d) Decomposers
Q.22.
The principal cation in alkaline soil is .... .... [M.P.P.M.T. 2011]
0%
a) Na+
100%
b) K+
0%
c) Ca2+
0%
d) Any of the above
Q.23.
Decomposers are .... .... [C.B.S.E.2001]
0%
a) Animalia and Monera
0%
b) Protista and Animalia
0%
c) Fungi and Plantae
100%
d) Bacteria and Fungi/Microorganisms
Q.24.
Social forestry is useful in yielding .... .... [Pb P.M.T. 2003]
0%
a) Floriculture
0%
b) Timber
100%
c) Medicines
0%
d) Multipurpose uses.
Q.25.
Grassland with scattered trees in .... .... [M.P.P.M.T.2004]
0%
a) Savannah
0%
b) Deciduous forest
100%
c) Evergreen forest
0%
d) Tropical rain forest
Q.26.
After Na,K and Cl sea water has higher concentration of .... .... [A.M.U. 2001]
0%
a) Mg
100%
b) Zn
0%
c) Ca
0%
d) Pb
Q.27.
Tropical deciduous forest trees shed their leaves to .... .... [Kerala 2003]
0%
a) Protect themselves from heat
100%
b) Save energy
0%
c) Enhance rate of respiration
0%
d) Prevent loss of water
Q.28.
Which one statement for pyramid of energy is incorrect .... .... [C.B.S.E.2011]
0%
a) Inverted in shape
0%
b) Upright in shape
100%
c) Base in broad
0%
d) Shows energy content of different trophic levels
Q.29.
If we remove half of the forest cover of earth, the crisis that will occur .... .... [C.B.S.E. 1996]
0%
a) Many species would become extinct
100%
b) Population, pollution and ecological imbalance will rise
0%
c) Energy crisis will commence
0%
d) The remaining forest will correct the imbalance
Q.30.
A recently discovered ecosystem is .... .... [C.E.T.Chd2000]
0%
a) Crater
0%
b) Tundra
100%
c) Floating iceberg
0%
d) Vent
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