What do biodegradable materials mean?

Only heat can act on these materials to degrade them

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Only acids can act on them to degrade them

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Microorganisms can act on them to degrade them

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All of the above

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Solution

The correct option is C Microorganisms can act on them to degrade them
Biodegradable materials can be degraded when microorganisms act on them.
Man made materials like plastics cannot be broken down by the action of bacteria or other saprophytes. These materials will be acted upon by physical processes like heat and pressure.

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Similar questions

	Biodegradable pollutants	Non-biodegradable pollutants
(i)	These are the pollutants that can be easily degraded by micro-organisms.	These are the pollutants that can not be degraded into harmless materials.
(ii)	These can be used to produce energy (through biogas), compost, manure, etc.	These are difficult to manage as a natural method of degradation is absent.
(iii)	These usually do not enter biogeochemical cycles.	These become a part of rapid turnover in biogeochemical cycles.
(iv)	Examples: DDT, BHC, plastics, polyethylene, glass, etc.	Examples: Sewage, garbage, animal waste, etc.

Manmade disasters have contributed to the rapid degradation of bio-diversity. List out them. [3 MARKS]

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