Junior Science: Ecology 1 (Jewel Case)$8.99Condition: New Warranty: 30 Days Operating System: Windows® 95~XP & Mac OS 7.5-9.2 Product Description: Explore some of the diverse ecosystems that make up our planet: forests, grasslands, and pond communities. Learn why an ecosystem's plants and animals are dependent upon one another for their existence, how their varied adaptations enhance their chance for survival, and how food energy flows from organism to organism. 
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