1. Energy Cycle of Biosphere
The modern biosphere probably had its beginning about two billion years ago with the evolution of marine organisms that not only could fix solar energy in organic compounds but also did it by splitting the water molecule and releasing free oxygen. ... Green plants are the "primary producers" of the biosphere, converting solar energy into organic compounds that maintain the plants and other living things. ... The energy that is not consumed is either stored or in humus and organic sediments. ... Some of the energy is stored in organic matter that accumulates as new tissue. ... Productivi...
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- Grade Level: Undergraduate