Q.1
There are two ways of exploitation. One way is parasitism. Which is the other one .... .... [Guj.C.E.T. 2011]
  • a) antibiosis
  • b) Competition
  • c) Predation
  • d) Commensalism
Q.2
The abundance of a species population within its habitat is called .... .... [C.B.S. E. 1995]
  • a) Absolute density
  • b) Regional density
  • c) Relative density
  • d) Niche density
Q.3
Zoochlorellae in Hydra produce an association called .... .... [Har.P.M.T. 2007]
  • a) Commensalism
  • b) Parasitism
  • c) Mutualism
  • d) Predation
Q.4
Mycorrhiza is symbiotic association between .... ..... [Kerala 2002]
  • a) Algae and fungi
  • b) Algae and roots of plants
  • c) Fungi and roots of plants
  • d) Viruses and bacteria
Q.5
Plants growing on sandstone are .... .... [R.P.M.T. 2000]
  • a) Psammophytes
  • b) Oxylophytes
  • c) Lithophytes
  • d) Phanerophytes
Q.6
Biome is .... .... [Odisha 2003]
  • a) Sum of ecosystems in a geographical area
  • b) Sum of ecosystem of the whole earth
  • c) Biotic component of an ecosystem
  • 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]
  • a) Jordan's rule
  • b) Bergman's rule
  • c) Allen's rule
  • d) Gloger's rule
Q.8
Submerged hydrophytes have well developed .... .... [B.H.U.1989]
  • a) Vascular system
  • b) Aerenchyma
  • c) Root system
  • 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]
  • a) Food plants mature and die at the end of rainy season
  • b) Population of predators increases enormously
  • c) Population growth curve is J-shaped
  • d) Population growth curve is S-shaped
Q.10
Vivipary occurs in .... .... [Wardha2000]
  • a) Betula
  • b) Rhizophora
  • c) Mango
  • 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]
  • a) Mycorrhizal association
  • b) Establishment of heterothallism
  • c) Operation of heterothallism
  • d) Advent of lichen formation
Q.12
Community is .... .... [C.P.M.T. 2002]
  • a) Group of independent, interaction populations of same species
  • b) Group of independent, interaction populations of sAme species in specific area
  • c) Group of independent, interaction populations of different species in specific area
  • 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]
  • a) Better adaptation to new area
  • b) More sexual reproduction
  • c) Better nesting habitats
  • d) Absence of natural competition
Q.14
Deserts can be converted into green land by .... .... [A.M.U. 1998]
  • a) Tropical trees
  • b) Oxylophytes
  • c) Halophytes
  • d) Psammophytes
Q.15
Stomata open at night in .... .... [Odisha 2012]
  • a) Succulents
  • b) Xerophytes
  • c) Hydrophytes
  • d) Mesophytes
Q.16
Term used to describe non-dominant species that dictates community structure is .... .... [Kerala 2004]
  • a) Pioneer species
  • b) Keystone species
  • c) Transitional species
  • d) Exogenous species
Q.17
Keystone species should be protected as they .... .... [A.I.I.M.S. 2006]
  • a) Are capable of surviving in harsh conditions of environment
  • b) Indicate presence of certain minerals in the soil
  • c) Have become rare due to over-exploitation
  • 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]
  • a) Individual plant
  • b) A population
  • c) A community
  • d) Individual plant
Q.19
Different communities appearing and replacing one another are called .... .... [R.P.M.T. 2011]
  • a) Climax communities
  • b) Seral communities
  • c) Serial communities
  • d) Successive communities
Q.20
Which one is exclusive xerophytic adaptation? .... .... [Har.P.M.T.2000]
  • a) Absence of stomata
  • b) Long tap root system
  • c) Stipular leaves
  • d) Spines
Q.21
Population of individuals belonging to same genetic stock differing markedly in vegetative characteristics are .... .... [C.E.T.Chd. 2006]
  • a) Flora
  • b) Ecotype
  • c) Ecotone
  • d) Ecads
Q.22
A matching pair is .... .... [A.I.I.M.S. 2003]
  • a) Shark and sucker fish - commensalism
  • b) Algae and fungi in lichens - mutualism
  • c) Orchids growing on trees - parasitism
  • d) Cuscuta growing on other flowering plants – Epiphytes
Q.23
Which take part in symbiosis of lichen .... .... [C.P.M.T. 1996]
  • a) Alga - fungus
  • b) Alga - alga
  • c) Fungus - fungus
  • d) Fungus – gymnosperm
Q.24
Organisms restricted to narrow range of temperature are .... .... [H.P.P.M.T. 2012]
  • a) Stenothermal
  • b) Eurythermal
  • c) Biothermal
  • d) Geothermal
Q.25
Biotrophic nutrition is shown by .... .... [C.P.M.T.2010]
  • a) Humans
  • b) Invertebrates
  • c) Insectivorous plants
  • 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]
  • a) Keystone species
  • b) Critical link species
  • c) Exotic species
  • d) Edge species
Q.27
In xerophytes, photosynthesis often occurs through .... ..... [Bih.P.M.T.2006]
  • a) Root
  • b)Modified stem
  • c) Stomata
  • d) Scaly leaves
Q.28
Ecology was coined by .... .... [H.P.P.M.T.1995]
  • a) Linnaeus
  • b) Haeckel
  • c) Harvey
  • 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
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.30
Hibernation occurring in certain animals is .... .... [A.M.U.2000]
  • a) Occasional
  • b) Intermittent
  • c) Rhythmic
  • d) Periodic
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