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B
Rudolf Virchow
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C
Robert Brown
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D
Robert Hooke
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Solution
The correct option is A Schleiden and Schwann Cell theory was propounded by Matthias Schleiden and Theodor Schwann in 1839. The cell theory was comprised of:
All organisms are made up of cells.
New cells are formed from preexisting cells
All cells are similar. Finally, cells are the most basic units of life.
Cells provide the basic units of functionality and structure in living things.