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17th Century, Theodor Schwann extends this idea to animals, proposing that…
17th Century
19th Century
1838
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1839
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1855
Rudolf Virchow asserts that "Omnis cellula e cellula," meaning that all cells arise from pre-existing cells, further solidifying the cell theory.
20th Century
1904
Discovery of the structure of chromosomes by several scientists, leading to insights about genetic material.
1920s-1930s
The development of various staining techniques and electron microscopy allows for detailed study of cellular structures.
1953
James Watson and Francis Crick describe the double helix structure of DNA, revolutionizing our understanding of genetics and cellular function.
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Late 20th Century
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1665
Robert Hooke publishes "Micrographia," where he coins the term "cell" after observing cork under a microscope. Although he was observing plant cells, his work laid the groundwork for cell theory.
Theodor Schwann extends this idea to animals, proposing that all living organisms are composed of cells. This work contributes to the development of the cell theory.
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