character: Jan Ingenhousz
topic: Photosynthesis Discovery
grade: 9
subject: Biology
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character: Joseph Priestley
topic: Role of Oxygen in Photosynthesis
grade: 9
subject: Biology
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character: Melvin Calvin
topic: Calvin Cycle and Carbon Fixation
grade: 9
subject: Biology
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character: Fritz Haber
topic: Impact on Plant Chemistry
grade: 9
subject: Biology
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