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Quiz 6
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Q.1
Succulents grow in .... .... [Maipur 2007]
0%
a) Tropical rain forest
0%
b) Tundra
0%
c) Desert
0%
d) Temperate deciduous forests
Explanation
Answer : (c)
Q.2
Which is wrongly matched? .... .... [Kerala 2005]
0%
a) Rhizobium - free living nitrogen fixer
0%
b) Humus - abiotic component
0%
c) Phosphorous cycle - sedimentary
0%
d) Shorea robusta - tropical deciduous forest
Explanation
Answer : (a)
Q.3
Which ecosystem has the highest gross primary productivity? .... .... [M.P.P.M.T.2012]
0%
a) Rain forest
0%
b) Coral reefs
0%
c) Mangroves
0%
d) Grasslands
Explanation
Answer : (b)
Q.4
Soil salinity is measured by .... .... [B.H.U. 2000]
0%
a) Porometer
0%
b) Potometer
0%
c) Calorimeter
0%
d) Conductivity meter
Explanation
Answer : (d)
Q.5
The major components of an ecosystem are .... .... [M.P.P.M.T. 1992]
0%
a) Food chain and decomposers
0%
b) Mineral cycling and energy flow
0%
c) Food chain and energy flow
0%
d) Energy flow and decomposers
Explanation
Answer : (a)
Q.6
Main cause of soil erosion is .... .... [C.P.M.T.1993]
0%
a) Afforestation
0%
b) Less rains
0%
c) Thinning of ozone layer
0%
d) Deforestation
Explanation
Answer : (d)
Q.7
Number of primary producers per unit area would be maximum in ..... .... [M.P.P.M.T.1995]
0%
a) Forest ecosystem
0%
b) Pond ecosystem
0%
c) Desert
0%
d) Grassland ecosystem
Explanation
Answer : (b)
Q.8
Universal non polluting source of energy is .... .... [Wardha 2003]
0%
a) Fossil fuel
0%
b) Sun
0%
c) Nuclear
0%
d) Wind and water
Explanation
Answer : (b)
Q.9
In biotic community, primary consumers are .... ..... [B.H.U.2002]
0%
a) Carnivores
0%
b) Omnivores
0%
c) Herbivores
0%
d) Detritivores
Explanation
Answer : (c)
Q.10
Concept of life forms was given by .... ..... [B.H.U.1998]
0%
a) Weaver
0%
b) Clements
0%
c) Raunkiaer
0%
d) Turesson
Explanation
Answer : (c)
Q.11
The biomass of each succeeding trophic level is .... .... [A.M.U.2002]
0%
a) More than the one preceding
0%
b) Less than the one preceding
0%
c) Constantly fixed
0%
d) Equal to next trophic level
Explanation
Answer : (b)
Q.12
Nitrogen fixation in root nodules of Alnus is brought about by .... .... [C.B.S.E. 2008]
0%
a) Azorhizobium
0%
b) Frankia
0%
c) Bradyrhizobium
0%
d) Clostridium
Explanation
Answer : (b)
Q.13
Biome has organisms of various trophic levels .... .... [A.M.U.1999]
0%
a) Reacting with abiotic environment
0%
b) Constitute a sociological unit
0%
c) Live a symbiotic life
0%
d) Inhabit a desert
Explanation
Answer : (a)
Q.14
In the soil conservation method, several grasses are left out in soil after the crop is harvested .... .... [Guj C.E.T. 2007]
0%
a) Tillage
0%
b) Crop rotation
0%
c) Terrace farming
0%
d) Contour farming
Explanation
Answer : (d)
Q.15
Old leguminous roots turn green due to ..... ..... [C.P.M.T.1998]
0%
a) Conversion of lehghaemoglobin to chl a
0%
b) Breakdown of lehghaemoglobin
0%
c) Conversion of lehghaemoglobin to chl b
0%
d) Conversion of lehghaemoglobin to chl c
Explanation
Answer : (b)
Q.16
Decomposers are .... .... [B.H.U.2008]
0%
a) Autotrophs
0%
b) Heterotrophs/organotrophs
0%
c) Autoheterotrophs
0%
d) Chemoautotrophs
Explanation
Answer : (b)
Q.17
Pyramid of numbers in a pond ecosystem is .... .... [C.B.S.E.1993]
0%
a) Irregular
0%
b) Inverted
0%
c) Upright
0%
d) Spindle-shaped
Explanation
Answer : (c)
Q.18
An incomplete ecosystem is .... .... [W .B. 2008]
0%
a) Grassland
0%
b) River
0%
c) Wetland
0%
d) Cave
Explanation
Answer : (d)
Q.19
Shifting cultivation or jhum belongs to category of .... .... [Kerala 2006]
0%
a) Industrial forestry
0%
b) Agroforestry
0%
c) Commercial forestry
0%
d) Social forestry
Explanation
Answer : (b)
Q.20
Phytoplankton are destroyed it will .... ..... [M.P.P.M.T.2000]
0%
a) Cause spurt in population of primary consumers
0%
b) Rapid growth of phase
0%
c) Affect the food chain
0%
d) Have no effect
Explanation
Answer : (c)
Q.21
Plains with snow, ice, frozen soil for most of the year are found in .... .... [Kerala 2000]
0%
a) Chaparral
0%
b) Taiga
0%
c) Tundra
0%
d) Desert
Explanation
Answer : (c)
Q.22
Shola forests occur in .... .... [D.P.M.T.2005]
0%
a) Indo Gangetic plain
0%
b)Terai
0%
c) Eastern Himalayas
0%
d) Western Ghats of Kerala
Explanation
Answer : (d)
Q.23
Correct sequences in a food chain is .... .... [A.F.M.C.1999]
0%
a) Grass → insects → birds → snake
0%
b) Grass → snake → insects → deer
0%
c) Grass → wolf → deer → buffalo
0%
d) Bacteria → grass → rabbit → wolf
Explanation
Answer : (a)
Q.24
ASSERTION: In tropical rain forests, O-horizon and A- horizon of soil profile are shallow nutrient poor REASON: Excessive growth of microorganisms in the soil depletes its organic content. A.I.I.M.S.2006
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
0%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
0%
c) Assertion is true but, Reason is false
0%
d) Assertion is false but, Reason is true
Explanation
Answer : (c)
Q.25
The two components of an ecosystem are .... .... [M.P.P.M.T.1999]
0%
a) Plants and animals
0%
b) Weeds, trees, animals and man
0%
c) Energy flow and mineral cycling
0%
d) Biotic and abiotic
Explanation
Answer : (d)
Q.26
A man-made micro-ecosystem is .... .... [M.P.P.M.T.2001]
0%
a) Plants grown in a pond
0%
b) Crop field
0%
c) Tank formed naturally in our courtyard
0%
d) Lake in a forest
Explanation
Answer:(b)
Q.27
Number of individuals of a species in a particular ecosystem at a given time remains constant due to .... .... [M.P.P.M.T.1998]
0%
a) Predators
0%
b) Parasites
0%
c) Man
0%
d) Food
Explanation
Answer : (a)
Q.28
Mulching is helpful in .... .... [Pb .PMT 2007]
0%
a) Increasing soil fertility
0%
b) Improvement of soil structure
0%
c) Moisture and soil conservation
0%
d) Better crops
Explanation
Answer : (c)
Q.29
Maximum use of fresh water is in .... .... [M.H.T.C.E.T. 2010.]
0%
a) Agriculture
0%
b) Domestic use
0%
c) Industry
0%
d) Pisciculture
Explanation
Answer : (a)
Q.30
Which of the following occurs in abiotic component of an ecosystem? .... .... [M.P.P.M.T.1999]
0%
a) Flow of energy
0%
b) Cycling of materials
0%
c) Consumers
0%
d) Flow of energy and cycling of materials
Explanation
Answer:(b)
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