character: Nina the Biologist
topic: Cell Membrane Functions
grade: 9
subject: Science
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character: Nina the Biologist
topic: Cell Structure and Function
grade: 9
subject: Science
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character: Nina the Biologist
topic: Membrane Transport Mechanisms
grade: 9
subject: Science
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character: Nina the Biologist
topic: Cellular Communication and Signaling
grade: 9
subject: Science
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