character: Marine Biologist
topic: Role of nutrients in aquatic food webs
grade: 9
subject: Chemistry
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character: Ecologist
topic: Importance of nutrient cycling in ecosystems
grade: 9
subject: Chemistry
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character: Biochemist
topic: Impact of nutrients on organism health in aquatic environments
grade: 9
subject: Chemistry
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character: Aquatic Chemist
topic: Chemical interactions of nutrients in water bodies
grade: 9
subject: Chemistry
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