character: Theodor Schwann
topic: Contributions to Animal Cell Theory
grade: 9
subject: Biology
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character: Robert Hooke
topic: Early Microscopic Observations of Cells
grade: 9
subject: Biology
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character: Marie François Xavier Bichat
topic: Tissue Theory and Its Relation to Cells
grade: 9
subject: Biology
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character: Rudolf Virchow
topic: Cell Theory and the Concept of Cell Division
grade: 9
subject: Biology
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