cbse biology class 9 chapter 1 notes
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Cell chapter
The cell theory
- The cell theory that all the plant and animal are composed of cell and the cell is the basic unit of life was presented by the two biologists schleiden and schwann
Explanation:
The cell theory futher expanded by virhow by suggesting that are cell arise from pre-exsting cell
- Types of organisms
- On the basis of no. Of cell, organisms are two types :
- Unicellular organism
- Multicellular oraganism
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