Question

23 multiple choice 2 points which statement best describes the biosphere? the uppermost layer of the atmosphere the lithosphere and hydrosphere combined the oceanic region below 200 meters the global sum of all ecosystems where life exists

Explanation:

The biosphere is defined as the global sum of all ecosystems where life exists. It encompasses all living organisms and their interactions with the atmosphere, hydrosphere, and lithosphere.

• The uppermost layer of the atmosphere is part of the atmosphere, not the biosphere.
• The lithosphere and hydrosphere combined do not fully represent the biosphere as it also includes living organisms.
• The oceanic region below 200 meters is just a small part of the biosphere.

Answer:

The global sum of all ecosystems where life exists