There are two ways of exploitation. One way is parasitism. Which is the other one .... .... [Guj.C.E.T. 2011]
100%
a) antibiosis
0%
b) Competition
0%
c) Predation
0%
d) Commensalism
Q.2.
The abundance of a species population within its habitat is called .... .... [C.B.S. E. 1995]
100%
a) Absolute density
0%
b) Regional density
0%
c) Relative density
0%
d) Niche density
Q.3.
Zoochlorellae in Hydra produce an association called .... .... [Har.P.M.T. 2007]
100%
a) Commensalism
0%
b) Parasitism
0%
c) Mutualism
0%
d) Predation
Q.4.
Mycorrhiza is symbiotic association between .... ..... [Kerala 2002]
0%
a) Algae and fungi
0%
b) Algae and roots of plants
100%
c) Fungi and roots of plants
0%
d) Viruses and bacteria
Q.5.
Plants growing on sandstone are .... .... [R.P.M.T. 2000]
100%
a) Psammophytes
0%
b) Oxylophytes
0%
c) Lithophytes
0%
d) Phanerophytes
Q.6.
Biome is .... .... [Odisha 2003]
0%
a) Sum of ecosystems in a geographical area
0%
b) Sum of ecosystem of the whole earth
100%
c) Biotic component of an ecosystem
0%
d) Biotic potential of a population
Q.7.
Ear lobes of arctic fox are smaller than that of tropical fox. This is .... .... [E.A.M.C.E.T.2005]
0%
a) Jordan's rule
0%
b) Bergman's rule
0%
c) Allen's rule
100%
d) Gloger's rule
Q.8.
Submerged hydrophytes have well developed .... .... [B.H.U.1989]
0%
a) Vascular system
0%
b) Aerenchyma
100%
c) Root system
0%
d) Stomatal system
Q.9.
Population of an insect species increases explosively during rainy season and then disappears at the end of the season. it shows .... .... [C.B.S.E.2007]
100%
a) Food plants mature and die at the end of rainy season
0%
b) Population of predators increases enormously
0%
c) Population growth curve is J-shaped
0%
d) Population growth curve is S-shaped
Q.10.
Vivipary occurs in .... .... [Wardha2000]
0%
a) Betula
0%
b) Rhizophora
100%
c) Mango
0%
d) Psidium
Q.11.
A teacher explaining physical contact leading to equal physiological dependence between two thalloid forms was telling about .... .... [ E.A.M.C.E.T. 2009]
0%
a) Mycorrhizal association
100%
b) Establishment of heterothallism
0%
c) Operation of heterothallism
0%
d) Advent of lichen formation
Q.12.
Community is .... .... [C.P.M.T. 2002]
100%
a) Group of independent, interaction populations of same species
0%
b) Group of independent, interaction populations of sAme species in specific area
0%
c) Group of independent, interaction populations of different species in specific area
0%
d) Group of independent, interaction populations of different species
Q.13.
A bird introduced from another country became a serious pest due to .... .... [D.P.M.T. 1996]
100%
a) Better adaptation to new area
0%
b) More sexual reproduction
0%
c) Better nesting habitats
0%
d) Absence of natural competition
Q.14.
Deserts can be converted into green land by .... .... [A.M.U. 1998]
100%
a) Tropical trees
0%
b) Oxylophytes
0%
c) Halophytes
0%
d) Psammophytes
Q.15.
Stomata open at night in .... .... [Odisha 2012]
100%
a) Succulents
0%
b) Xerophytes
0%
c) Hydrophytes
0%
d) Mesophytes
Q.16.
Term used to describe non-dominant species that dictates community structure is .... .... [Kerala 2004]
100%
a) Pioneer species
0%
b) Keystone species
0%
c) Transitional species
0%
d) Exogenous species
Q.17.
Keystone species should be protected as they .... .... [A.I.I.M.S. 2006]
100%
a) Are capable of surviving in harsh conditions of environment
0%
b) Indicate presence of certain minerals in the soil
0%
c) Have become rare due to over-exploitation
0%
d) Play an important role in supporting other species
Q.18.
Synecology is study of inter-relationship between environment and .... .... [E.A.M.C.E.T.1995]
100%
a) Individual plant
0%
b) A population
0%
c) A community
0%
d) Individual plant
Q.19.
Different communities appearing and replacing one another are called .... .... [R.P.M.T. 2011]
100%
a) Climax communities
0%
b) Seral communities
0%
c) Serial communities
0%
d) Successive communities
Q.20.
Which one is exclusive xerophytic adaptation? .... .... [Har.P.M.T.2000]
100%
a) Absence of stomata
0%
b) Long tap root system
0%
c) Stipular leaves
0%
d) Spines
Q.21.
Population of individuals belonging to same genetic stock differing markedly in vegetative characteristics are .... .... [C.E.T.Chd. 2006]
100%
a) Flora
0%
b) Ecotype
0%
c) Ecotone
0%
d) Ecads
Q.22.
A matching pair is .... .... [A.I.I.M.S. 2003]
100%
a) Shark and sucker fish - commensalism
0%
b) Algae and fungi in lichens - mutualism
0%
c) Orchids growing on trees - parasitism
0%
d) Cuscuta growing on other flowering plants – Epiphytes
Q.23.
Which take part in symbiosis of lichen .... .... [C.P.M.T. 1996]
100%
a) Alga - fungus
0%
b) Alga - alga
0%
c) Fungus - fungus
0%
d) Fungus – gymnosperm
Q.24.
Organisms restricted to narrow range of temperature are .... .... [H.P.P.M.T. 2012]
100%
a) Stenothermal
0%
b) Eurythermal
0%
c) Biothermal
0%
d) Geothermal
Q.25.
Biotrophic nutrition is shown by .... .... [C.P.M.T.2010]
100%
a) Humans
0%
b) Invertebrates
0%
c) Insectivorous plants
0%
d) Saprophytic plants
Q.26.
Organisms spending most of the time in transitional area between the two communities are .... .... [H.P.P.M.T. 2005]
100%
a) Keystone species
0%
b) Critical link species
0%
c) Exotic species
0%
d) Edge species
Q.27.
In xerophytes, photosynthesis often occurs through .... ..... [Bih.P.M.T.2006]
100%
a) Root
0%
b)Modified stem
0%
c) Stomata
0%
d) Scaly leaves
Q.28.
Ecology was coined by .... .... [H.P.P.M.T.1995]
100%
a) Linnaeus
0%
b) Haeckel
0%
c) Harvey
0%
d) Odum/Lamarck
Q.29.
ASSERTION: Most marine animals find it difficult to live in fresh water and vice versa REASON: Some animals can tolerate a narrow salinity range while others can bear a wide salinity range A.I.I.M.S.2012
100%
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
Q.30.
Hibernation occurring in certain animals is .... .... [A.M.U.2000]
100%
a) Occasional
0%
b) Intermittent
0%
c) Rhythmic
0%
d) Periodic
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