How are cells organised in an organism?

Cells in an organism are organised into different layers or groups which form tissues. Those tissues combine to form organs, and organs combine to form organ systems and organ systems form a complete organism. These groups of cells carry out a specialized function. 

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cells are formed from the pre-existing cells.

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  1. ALL THE PLANTS AND ANIMALS ARE COMPOSED OF CELL AND CELL IS THE  BASIC UNIT OF LIFE 
  2. ALL CELL ARISE FROM PRE EXISTING CELLS
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Depending on the work they do . 

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