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