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DIscovered the cell by observing cork through a micrscope.
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Leewenhoek discovered the single celled organism by using an improved microscope from Hooke's. This proved that organisms could be consistent of only 1 cell.
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Dujardin improved upon the idea that there were single celled organisms and observed living organisms having internal substance.
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Focused primarily on cells in plants. Known as the "founder" of cell theory because of his partnership with Schwann
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During an expierment similar to Schleiden's Schwann discovered that all animals were made of cells. He also believed that cells formed from pre-existing cells
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Suggested that cells are the most basic form of all life. He also stated that new cells arise from old ones.
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Suggested that when an organism retains a virus that it is not the organism that is sick, but the individual cells inside the organism.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2603088/
