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Organisms And The Environment Mcq
Quiz 6
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Q.1
Physiognomy is .... .... [H.P.P.M.T. 2007]
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a) Physiology of communities
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b) Anatomy of communities
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c) External appearance of communities
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d) Both A and B
Explanation
Answer : (c)
Q.2
Rhizobium bacteria and root nodules of pea have an association called .... .... [Kerala 2002]
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a) Predation
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b) Parasitism
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c) Symbiosis
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d) Commensalism
Explanation
Answer : (c)
Q.3
Adaptive measure to protect against extreme heat by poikilotherm is .... .... [H.P.P.M.T. 2012]
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a) Hibernation
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b) Sweating
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c) Aestivation
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d) Coiling
Explanation
Answer : (c)
Q.4
In commensalism .... .... [A.F.M.C.2007]
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a) Both partners are benefitted
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b) Both partners are harmed
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c) Weaker is benefitted while stronger is unharmed
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d) None of the above
Explanation
Answer : (c)
Q.5
Age pyramid with broad base indicates .... .... [D.P.M.T. 2011]
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a) High percentage of young individuals
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b) Low percentage of young individuals
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c) High percentage of old individuals
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d) Low percentage of old individuals
Explanation
Answer : (a)
Q.6
The sum total of the population of the same kind of organisms constitute .... .... [C.B.S.E.1993]
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a) Colony
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b) Genus
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c) Community
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d) Species
Explanation
Answer : (d)
Q.7
Plants species with wide range of distribution evolves into local population is called .... .... [Kerala 2009]
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a) Ecosystems
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b) Populations
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c) Ecotypes
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d) Ephemerals
Explanation
Answer : (c)
Q.8
Amongst hydrophytes finely dissected leaves occur in .... .... [C.P.M.T.1991]
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a) Rooted floating leaved plants
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b) Submerged plants
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c) Emerged plants
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d) Free floating plants
Explanation
Answer : (b)
Q.9
Tenebrionid beetles are famous for .... .... [C.E.T.Chd. 2011]
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a) Conscious mimicry
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b) Aggressive mimicry
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c) Mullerian mimicry
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d) Batesonian mimicry
Explanation
Answer : (a)
Q.10
Large scale diurnal variation in surface temperature occurs in .... .... [Odisha 2008]
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a) Sea
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b) Lake
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c) Tundra
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d) Desert
Explanation
Answer : (d)
Q.11
ASSERTION: Frog can change colour according to its surrounding REASON: It is mimicry to capture preys A.I.I.M.S. 2012
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
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c) Assertion is true but, Reason is false
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d) Assertion is false but, Reason is true
Explanation
Answer : (c)
Q.12
Competition is the most severe between two .... .... [C.P.M.T.1991
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a) Closely related species growing different niche
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b) Closely related species growing in same habitat
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c) Distantly related species growing in same habitat
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d) Distantly related species growing in different niches
Explanation
Answer : (b)
Q.13
Succession showing changes in communities at a place is called .... .... [A.M.U. 1997]
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a) Geographical succession
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b) Biotic succession
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c) Physiographic succession
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d) Climate succession
Explanation
Answer : (b)
Q.14
Monarch butterfly is not eaten by predators because of .... .... [A.I.I.M.S 2011]
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a) Rough skin
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b) Bitter taste
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c) Foul smell
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d) Colouration
Explanation
Answer : (b)
Q.15
A plant of reed-swap stage is ..... ..... [J.K.C.M.E.E.2008]
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a) Juncus
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b) Salix
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c) Trapa
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d) Sagittaria
Explanation
Answer : (d)
Q.16
Range of latitude of temperature region is ..... ..... [Guj.C.E.T]
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a) 40 - 60
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b) 0 - 20
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c) 20 - 40
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d) 60 – 80
Explanation
Answer : (a)
Q.17
Which statement is false about predators .... ..... [Kerala 2012]
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a) Predators keep prey population under control
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b) Predators help in maintaining species diversity in a community
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c) If a predator is not efficient, the prey population will become extinct
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d) Tiger is an example of predator
Explanation
Answer : (c)
Q.18
The term of ecology was actually coined by .... .... [A.M.U.1999]
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a) Aristotle
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b) Reiter
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c) Linnaeus
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d) Odum
Explanation
Answer : (b)
Q.19
Competition causes .... .... [D.P.M.T. 2007]
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a) Symbiosis
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b) Extinction
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c) Mutualism
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d) Larger number of niches
Explanation
Answer : (d)
Q.20
Hydrophytes with both hydrophytic and xerophytic traits is .... .... [C.P.M.T.2001]
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a) Agave
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b) Nerium
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c) Vallisneria
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d) None of the above
Explanation
Answer : (d)
Q.21
Best method to solve population problem in india is to .... .... [M.P.P.M.T. 2012]
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a) Increase food population
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b) Increase medical facilities
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c) Reduce birth rate
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d) Conserve natural resources
Explanation
Answer : (c)
Q.22
Human population before .... ..... [M.P.P.M.T. 2000]
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a) J-shaped growth curve
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b) Z-shaped growth curve
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c) S-shaped growth curve
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d) All the above
Explanation
Answer : (c)
Q.23
Scholars caught, marked and released 80 fishes in a pond. Later 100 fishes were caught at random. 40 of them were marked. The number of fishes in the pond is .... .... [A.I.I.M.S 2001]
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a) 400
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b) 200
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c) 100
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d) 50
Explanation
Answer : (b)
Q.24
Plants growing on sandy soils are .... .... [Odisha 2010]
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a) Oxylophytes
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b) Psammophytes
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c) Psychrophytes
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d) Lithophytes
Explanation
Answer : (b)
Q.25
Vertical distribution of species occupying different heights is .... .... [J.K.C.E.T. 2012]
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a) Stratification
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b) Population dispersal
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c) Population fragmentation
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d) Population mobilization
Explanation
Answer : (a)
Q.26
Soil best suited for plant growth .... .... [C.P.M.T.2010]
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a) Clay
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b) Loam
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c) Sandy
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d) Gravel
Explanation
Answer : (b)
Q.27
Which one is the following is a characteristic of biological community .... .... [C.B.S.E.2010]
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a) Natality
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b) Mortality
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c) Sex ratio
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d) Stratification
Explanation
Answer : (d)
Q.28
In submerged hydrophytes the stomata occur .... .... [C.P.M.T.1990]
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a) On lower surface
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b) On the upper surface
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c) No where
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d) On both the surface
Explanation
Answer : (c)
Q.29
A non flowering plant of submerged stage is .... .... [Guj.C.E.T.2010]
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a) Vallisneria
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b) Ceratophyllum
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c) Chara
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d) Hydrilla
Explanation
Answer : (c)
Q.30
Organisms capable of maintaining constant body temperature are .... .... [B.H.U.2012]
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a) Excreting hypotonic urine
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b) Excreting wastes as uric acid
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c) Drinking small amount of water
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d) Excreting salt across their gills
Explanation
Answer : (a)
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