BIOL 3020 Lecture Notes - Intertropical Convergence Zone, Alpine Tundra, Cool Air

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Chapter 52: ecology and the distribution of life. As air mass moves toward equator, it encounters an increasingly faster spin, and its rotational movement is slower than that of the earth beneath it. Clouds form on the windward side and release moisture as rain or snow. On the leeward side, dry air descends, warms and picks up moisture resulting in a rain shadow on the leeward side. In both hemispheres, water flows toward the equator along the western sides of continents until it meets at the equator and flows westward again. Organisms must adapt to changes in their environment. Few individuals die exactly where they were born; most move or are moved to a new place dispersal. If repeated seasonal changes alter an environment in predictable ways, organisms may evolve life cycles that appear to anticipate those changes migration and hibernation.

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