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character: Trophic Cascade
topic: Predator-Prey Relationships
grade: 9
subject: Biology
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character: Energy Pyramid
topic: Trophic Levels in Ecosystems
grade: 9
subject: Biology
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character: Keystone Species
topic: Impact of Predators on Food Webs
grade: 9
subject: Biology
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character: Food Chain
topic: Linear Representation of Trophic Levels
grade: 9
subject: Biology
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