General Knowledge - World Geography - Discussion

54. 

The part of the earth and thin layer of air above its surface, which support life on earth, are referred to as

[A]. stratosphere
[B]. ionosphere
[C]. biosphere
[D]. mesosphere

Answer: Option C

Explanation:

No answer description available for this question.

Soumya Satyakanta said: (Jun 27, 2013)  
As it also supports life on earth it is called biosphere. It is the sum of lithosphere, hydrosphere and atmosphere.

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