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Neet Biology Ecosystem Mcq
Quiz 11
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Q.1
Source of energy in ecosystem is .... .... [C.P.M.T.2002]
0%
a) Sun
0%
b) Sugar produced in photosynthesis
0%
c) Green plants
0%
d) ATP
Explanation
Answer : (a)
Q.2
Percentage of precipitation that can be stored in dams of India is .... .... [D.P.M.T 2009]
0%
a) 10
0%
b) 18
0%
c) 43
0%
d) 55
Explanation
Answer : (a)
Q.3
A rat feeding on potato tuber is .... .... [K.C.E.T.1999]
0%
a) Producer
0%
b) Primary consumer
0%
c) Carnivore
0%
d) Decomposer
Explanation
Answer : (b)
Q.4
Least porous soil is .... .... [D.P.M.T 2009]
0%
a) Silt soil
0%
b) Peat soil
0%
c) Clay soil
0%
d) Loam soil
Explanation
Answer : (c)
Q.5
An ecosystem is .... .... [M.P.PM.T.1992]
0%
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
Explanation
Answer : (a)
Q.6
Energy enters an ecosystem through ..... .... [C.P.M.T.1998]
0%
a) Herbivores
0%
b) Producers
0%
c) Carnivores
0%
d) Decomposers
Explanation
Answer : (b)
Q.7
Pyramid of energy is .... .... [A.M.U.2010]
0%
a) Always inverted
0%
b) Always upright
0%
c) Spindle-shaped
0%
d) Both upright and inverted depending upon ecosystem
Explanation
Answer : (b)
Q.8
The upright pyramid of number is absent in ... ... [C.B.S.E. 2012]
0%
a) Lake
0%
b) Forest
0%
c) Grassland
0%
d) Pond
Explanation
Answer : (b)
Q.9
Crop rotation is employed for .... .... [C.P.M.T.2003]
0%
a) Increasing nitrogen content of soil
0%
b) Checking soil erosion
0%
c) Community development
0%
d) Enhancing soil fertility
Explanation
Answer : (d)
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
0%
d) tertiary consumer
Explanation
Answer : (c)
Q.11
Phytoplankton is component of .... .... [Bihar.P.M.T.2001]
0%
a) Pond ecosystem
0%
b) Desert ecosystem
0%
c) Grass ecosystem
0%
d) Forest ecosystem
Explanation
Answer : (a)
Q.12
Highest annual net primary productivity is of .... .... [M.P.P.M.T.2010]
0%
a) Tropical deciduous forests
0%
b) Temperate evergreen forest
0%
c) Temperate deciduous forest
0%
d) Tropical rain forest
Explanation
Answer : (d)
Q.13
Most primary productivity of pond is by .... ..... [Manipal 2004]
0%
a) Phytoplankton
0%
b) Zooplankton
0%
c) Floating plants
0%
d) Red algae
Explanation
Answer : (a)
Q.14
Percentage of forest cover recommended by National Forest Policy (1988) is .... .... [Kerala 2009]
0%
a) 30% in plains, 60% in hills
0%
b) 20% in plains, 70% in hills
0%
c) 33% in plains, 67% in hills
0%
d) 37% in plains, 67% in hills
Explanation
Answer : (c)
Q.15
CO2 and O2 balance in atmosphere is due to .... .... [Bih.P.M.T.1995]
0%
a) Photosynthesis
0%
b) Respiration
0%
c) Leaf anatomy
0%
d) Photorespiration
Explanation
Answer : (a)
Q.16
Bioindicators are used for knowing .... .... [M.P.P.M.T. 2007]
0%
a) Minerals
0%
b) Oxygen demand
0%
c) Air pollution
0%
d) All
Explanation
Answer : (d)
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
0%
d) Interchange between producers and consumers
Explanation
Answer : (d)
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
0%
c) Producers
0%
d) Primary producers
Explanation
If all carbon dioxide were removed from the biosphere, the first organism to experience negative effects would be the primary producers (d). Primary producers rely on photosynthesis to survive. The process of photosynthesis requires carbon dioxide. Without carbon dioxide, primary producers would quickly begin to die. Once producers began to die, the rest of the food chain would feel the effects of carbon dioxide removal from the biosphere. Answer : (d)
Q.19
A characteristic of mangroves is .... .... [A.M.U.2003]
0%
a) Vivipary
0%
b) Pneumatophores
0%
c) Supporting roots
0%
d) All
Explanation
Answer : (d)
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
0%
c) Mangroves
0%
d) Oceanic island communities
Explanation
Answer : (d)
Q.21
In food web, hyenas and vultures are .... .... [M.P.P.M.T.2004]
0%
a) Primary consumers
0%
b) Predators
0%
c) Scavengers
0%
d) Decomposers
Explanation
Answer : (c)
Q.22
The principal cation in alkaline soil is .... .... [M.P.P.M.T. 2011]
0%
a) Na+
0%
b) K+
0%
c) Ca2+
0%
d) Any of the above
Explanation
Answer : (c)
Q.23
Decomposers are .... .... [C.B.S.E.2001]
0%
a) Animalia and Monera
0%
b) Protista and Animalia
0%
c) Fungi and Plantae
0%
d) Bacteria and Fungi/Microorganisms
Explanation
Answer : (d)
Q.24
Social forestry is useful in yielding .... .... [Pb P.M.T. 2003]
0%
a) Floriculture
0%
b) Timber
0%
c) Medicines
0%
d) Multipurpose uses.
Explanation
Answer : (d)
Q.25
Grassland with scattered trees in .... .... [M.P.P.M.T.2004]
0%
a) Savannah
0%
b) Deciduous forest
0%
c) Evergreen forest
0%
d) Tropical rain forest
Explanation
Answer : (a)
Q.26
After Na,K and Cl sea water has higher concentration of .... .... [A.M.U. 2001]
0%
a) Mg
0%
b) Zn
0%
c) Ca
0%
d) Pb
Explanation
Answer : (a)
Q.27
Tropical deciduous forest trees shed their leaves to .... .... [Kerala 2003]
0%
a) Protect themselves from heat
0%
b) Save energy
0%
c) Enhance rate of respiration
0%
d) Prevent loss of water
Explanation
Answer : (d)
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
0%
c) Base in broad
0%
d) Shows energy content of different trophic levels
Explanation
Answer : (a)
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
0%
b) Population, pollution and ecological imbalance will rise
0%
c) Energy crisis will commence
0%
d) The remaining forest will correct the imbalance
Explanation
Answer : (b)
Q.30
A recently discovered ecosystem is .... .... [C.E.T.Chd2000]
0%
a) Crater
0%
b) Tundra
0%
c) Floating iceberg
0%
d) Vent
Explanation
Answer : (d)
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