Cell Theory


 
 
Concept Explanation
 

Cell Theory 

The cell theory was formulated by two German Scientists, Matthias Schleiden and Theodore Schwann independently.

Thus, the cell theory states that

  • All living organisms are composed of cells and their products.
  • All cells arise from pre-existing cells.
  • Cells show similarity in chemical composition and metabolic activities.
  • Cells are the structural and functional unit of living organism.
  • Objections to Cell Theory : -

    Cell theory failed to explain how and from where the new cells were formed. All these observations lead to a major expansion of cell theory that was expressed by Rudolf Virchow in 1855 modified the hypothesis of Schleiden and Schwann and explained in his statement that cells divide and new cells are formed from pre-existing cells, i.e., Omnis cellule-e-cellula.

    Sample Questions
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    Question : 1

    Cell theory states that _______________________

    Right Option : B
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    Explanation
     
     
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