Chapter 37: Ecosystems
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37.1: Activity: An idealized energy pyramid
Test your recall for figure 37.6 with this key figure labeling exercise.
37.2: Tutorial: The sulfur cycle
This tutorial explores how the atmospheric cycle for sulfur produces acid rain.
37.3: Tutorial: The phosphorus cycle
This tutorial explores how the sedimentary cycle allows phosphorus, a major nutrient, to be incorporated into cells.
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