Question

define the biosphere

Answer 1

the space where lithosphere, atmosphere and hydrosphere meet

Answer 2

Thebiosphere(fromGreekβίοςbíos"life" and σφαῖραsphaira"sphere") also known as theecosphere(from Greek οἶκοςoîkos"environment" and σφαῖρα), is the worldwide sum of allecosystems. It can also be termed the zone oflifeonEarth, a closed system (apart fromsolarandcosmic radiationandheatfrom the interior of the Earth), and largely self-regulating.[1]By the most generalbiophysiologicaldefinition, the biosphere is the globalecologicalsystem integrating allliving beingsand their relationships, including their interaction with the elements of thelithosphere,geosphere,hydrosphere, andatmosphere. The biosphere is postulated to haveevolved, beginning with a process ofbiopoiesis(life created naturally from non-living matter, such as simple organic compounds) orbiogenesis(life created from living matter), at least some 3.5 billion years ago.[2][3]