You searched for: “biospheres”
biospheres
Relatively thin life-supporting areas of the earth's surface, extending from a few miles into the atmosphere to the deep-sea vents of the oceans.

The biospheres are global ecosystems that can be broken down into regional or local ecosystems, or biomes.

Organisms in the biospheres are classified into trophic levels (steps) and communities.

This entry is located in the following unit: sphero-, spher-, -sphere- (page 6)
Word Entries at Get Words: “biospheres”
biosphere (s) (noun), biospheres (pl)
All of those regions of Earth's waters, crust, and atmosphere in which organisms can exist: The biosphere is capable of supporting life.
This entry is located in the following unit: Biology Terms + (page 2)