State the key features of the cell theory

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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.

Limitation of this theory is its 3rd conclusion that cell forms by free cell formation similar to the formation of the crystal.
The cell theory was further expanded and corrected by Virchow (1855) by suggesting that all cells arise from pre-existing cells.


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cell theoryis ascientific theorythat describes the properties ofcells, the basic unit of structure in every living thing.Cell theory is one of the foundations of biology.

The three parts to the cell theory are as described below:

All living organisms are composed of one or more cells.The cell is the basic unit of structure, function, and organization in all organisms.All cells come from preexisting, living cells.
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