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Zacharias Janssen contributed to the cell theory because he invented the Microscope.
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Robert Hooke contributed to the Cell Theory because he discovered the cell.
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Anton Van Leeuwenhoek helped the cell theory because he messed with the microscope lenses to make them more clear.
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He helped with the cell theory because he discovered that all plants are composed of cells.
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He helped the cell theory because he stated that "Different parts of the plants organisms are composed of cells."
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He helped the cell thoery because he was the one who said that "All cells come from pre-existing cells."
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Picture and info: "Matthias Schleiden (1804-1881)." Matthias Schleiden (1804-1881). N.p., n.d. Web. 21 Sept. 2015. Picture and info: "Rudolf Virchow." Wikipedia. Wikimedia Foundation, n.d. Web. 21 Sept. 2015. "Theodor Schwann Theorizes That All Living Things Are Made of Cells." Theodor Schwann Theorizes That All Living Things Are Made of Cells. N.p., n.d. Web. 21 Sept. 2015.
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Modern cell theory-Statement 1-All living organisms are composed of one or more cells.Statement 2-The cell is the most basic unit of life.Statement 3-All cells arise from pre-existing, living cells, by biogenesis.
