what is cell theory.
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Cell theory
In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms .
In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms .
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The cell theory was proposed by two scientists- Schleiden (1838)and Schwann (1839). It says that all the plants and animals are composed of cells and the cell is the basic unit of life. The cell theory was further expanded by Virchow (1855) by suggesting that all cells arise from pre-existing cells.Key points of the cell theory are as follows:All known living things are made up of one or more cells.All cells arise from pre-existing cells by division.The cell is the fundamental unit of structure and function in all living organisms.The activity of an organism depends on the total activity of independent cells.Energy flow occurs within cells.
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