Biology 3.1 Cell Theory

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Cell Theory
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1) All organisms are made of cells. 2) All existing cells are produced by other living cells. 3) The cell is the most basic unit of life.
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Robert Hooke
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The first to identify cells, and he named them.
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Anton van Leeuwenhoek
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Made better lenses, so he was able to observe cells in greater detail.
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Matthias Scleiden
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The first to note that plants are made of cells.
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Theodor Schwann
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conncluded that all living things are made of cells.
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Rudolf Virchow
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proposed that all cells come from other cells.
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Cytoplasm
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A jellylike substance that contains dissolved molecular building blocks- such as proteins, nucleic acids, minerals, and ions.
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Organelles
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structures specialized to perform distinct processes within a cell.
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Prokaryotic Cell
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doesn’t have a nucleus or other membrane bound organelles. Can only be single-celled.
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Eukaryotic Cell
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Has a nucleus and other membrane bound organelles. Can be multi-cellular or single-celled.

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