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character: Positive Polly
topic: Positive Feedback in Biological Systems
grade: 9
subject: Science
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character: Homeostasis Harry
topic: Maintaining Balance in Biological Systems
grade: 9
subject: Science
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character: Feedback Frank
topic: Types of Feedback Mechanisms
grade: 9
subject: Science
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character: Regulatory Rachel
topic: Regulation in Biological Processes
grade: 9
subject: Science
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