Question

(b) What is meant by 'biosphere'?
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Answer 1

Explanation:

The biosphere, (from Greek bios = life, sphaira, sphere) is the layer of the planet Earth where life exists. ... The biosphere is one of the four layers that surround the Earth along with the lithosphere (rock), hydrosphere (water) and atmosphere (air) and it is the sum of all the ecosystems. The biosphere is unique.

Answer 2

Answer:

The biosphere is made up of the parts of Earth where life exists all ecosystems. The biosphere extends from the deepest root systems of trees, to the dark environments of ocean trenches...

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