Schleiden and Schwann proposed the "CELL THEORY"

Postulates of Cell Theory are ===

Cell is the basic unit of life.
All Organism are made of minute Cell.
Each cell is made up of Protoplasm with a nucleus and bounded by plasma membrane with or without a cell wall. 
cells are basically alike in their structure and metabolic activities
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cell theory is proposed by schleiden and schwann in 1938-1939
1) cells are basic unit of life
2) all living organisms composed of one cell or more cellls
3) the fundmental biochemical reactions take place within cells
this three was proposed by them but they did not tell how new cells form
this was proposed by rudolf von virchow in 1955 that
4) new cells arise from pre existing cells

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