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Question

Assertion: Living organisms are regarded as closed systems.
Reason: Energy of living organisms can be lost to or gained from external environment

A
Both assertion and reason are true and the reason is the correct explanation of assertion
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B
Both assertion and reason are true but reason is not the correct explanation of assertion
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C
Assertion is true but reason is false
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D
Assertion is false and reason is true
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Solution

The correct option is D Assertion is false and reason is true

Open systems are material systems in which mass or energy can be lost to or gained from the environment. Living organisms basically gain energy from the sun or other organisms, that is from a source outside the organism, and they lose energy in the form of heat. Similarly they gain mass through food, from an outside source. Therefore matter and energy enters the system from an external source and is lost from the system eventually. Therefore living organisms are open systems.


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