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Class 12 Biology
Ecosystem Chapter 14
Quiz 1
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A biome is
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Sum of all ecosystems on the Earth
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Biotic components in a population
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Sum of ecosystems in a geographical area
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Biotic components in an ecosystem
The important steps in the process of decomposition are
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Fragmentation and mineralisation
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Leaching and catabolism
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Humification and mineralisation
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All of the above
Ecosystem is
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Open
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Close
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Both open and close
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Neither opened nor closed
Biosphere means
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Atmosphere, lithosphere and hydrosphere
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Lithosphere and ionosphere
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Hydrosphere, lithosphere and ionosphere
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Atmosphere
Germplasm conservation at liquid N2 temperature is
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Stratification
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Cryopreservation
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Scarification
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None of the above
The decomposition of organic matter is brought about by
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Protozoans
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Plants
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Microorganisms
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None of the above
Secondary productivity is the rate of formation of new organic matter by
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Decomposer
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Consumer
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Producer
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Parasite
The boundary or transition between two or more communities is called:
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Ecotype
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Thermocline
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Ecotone
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Biome
Detritivores break down the detritus by the process called
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Mineralisation
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Humification
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Leaching
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Fragmentation
The biomass available for consumption to heterotrophs and the rate of formation of new organic matter by consumers are defined as
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Net primary productivity and gross primary productivity, respectively.
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Gross primary productivity and net primary productivity, respectively.
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Gross primary productivity and secondary productivity, respectively.
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Net primary productivity and secondary productivity, respectively.
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