(Opening image courtesy of Metatron, http://en.wikipedia.org/wiki/File:Ocellaris_clownfish.JPG,, and under the Creative Commons license CC-BY-SA 3.0.)
Lesson 12.1: Community Interactions
Lesson 12.2: Characteristics of Populations
Lesson 12.3: Human Population Growth
Lesson 12.4: The Biodiversity Crisis
Lesson 12.5: Natural Resources and Climate Change
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