character: Rudolf Virchow
topic: Cell Division and Omnis Cellula e Cellula
grade: 9
subject: Biology
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character: Robert Hooke
topic: Cell Theory
grade: 9
subject: Biology
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character: Theodor Schwann
topic: Cell Theory Contributions
grade: 9
subject: Biology
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character: Anton van Leeuwenhoek
topic: Discoveries in Microbiology
grade: 9
subject: Biology
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