character: Mr. Black
topic: Oxygen and Its Influence on Biodiversity
grade: 12
subject: Chemistry
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character: Dr. Green
topic: Photosynthesis and Its Role in Ecosystem Balance
grade: 12
subject: Chemistry
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character: Ms. White
topic: The Impact of Oxygen Levels on Aquatic Life
grade: 12
subject: Chemistry
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character: Prof. Brown
topic: Chemical Cycling and Biodiversity in Various Habitats
grade: 12
subject: Chemistry
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