Biology   Guttman
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This chapter's focus, the biosphere, is defined as the part of the planet where all organisms live, or the sum of the earth's ecosystems. The structure of the biosphere is examined in detail, along with the energy that drives it. Other forces, including geographical, geological, and meteorological, are also examined and their contributions to the overall biosphere are explained. Continental drift is also covered in connection with possible explanations for the diversity of organisms.uss how simple changes can result in dramatic evolution (Figures 24.26, 24.27, 24.28, and 24.29).

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