character: Jan Ingenhousz
topic: Photosynthesis Pioneer
grade: 9
subject: Biology
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character: Joseph Priestley
topic: Discoveries in Plant Respiration
grade: 9
subject: Biology
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character: Theodore Engelmann
topic: Plant Photosynthesis Experiments
grade: 9
subject: Biology
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character: Melvin Calvin
topic: Calvin Cycle in Photosynthesis
grade: 9
subject: Biology
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