character: Mr. Lee
topic: The role of dissolved oxygen in aquatic habitats
grade: 10
subject: Biology
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character: Biology Teacher
topic: Importance of oxygen levels for aquatic life
grade: 10
subject: Biology
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character: Environmental Scientist
topic: Impact of dissolved oxygen on aquatic ecosystems
grade: 10
subject: Biology
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character: Marine Biologist
topic: Dissolved oxygen and its effects on fish health
grade: 10
subject: Biology
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