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Question

Which among the following statements is/are true about the Biosphere?

A
It comprises all the living creatures on earth.
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B
It is the zone where the lithosphere, atmosphere, and hydrosphere interact.
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C
The first living organisms in the biosphere were multi-cellular prokaryotes.
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D
It extends to a height of 20 km from the ocean floor.
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Solution

The correct options are
A It comprises all the living creatures on earth.
B It is the zone where the lithosphere, atmosphere, and hydrosphere interact.
D It extends to a height of 20 km from the ocean floor.
The biosphere is the life-supporting stratum of earth's surface., including the hydrosphere, lithosphere, and atmosphere. It is the place wherein all living organisms interact with the abiolitic components of the ecosystem. The biosphere extends to a height of 20 km from the ocean floor. Different biological functions occur in the biosphere. They are photosynthesis, respiration, decomposition, nitrogen fixation, and denutrification. The biosphere has evolved since the first single-celled prokaryotes originated around 3.5 billion years ago.

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