Biology 3.1
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- Cell Theory
- - Many scientists contributed to the cell theory - More was learned about the cell as the microscope improved - The cell theory is the unifying theme of biology
- 3 principles of the Cell Theory
- 1. All organisms are made of cells 2. All existing cells are produced by living things 3. The cell is the most basic unit of life
- All Cells Share Certain Characteristics
- - All cells are microscopic - All cells are enclosed by a membrane - All cells are filled with cytoplasm
- Eukaryote
- - Nucleus - Orgenelles
- Prokaryote
- - No nucleus - No organelles
- Robert Hooke
- - First to identify cells - Named them
- Leeuwenhoek
- - Created better lenses - Observed cells in greater detail
- Schleiden
- - First to note plants were made of cells
- Schwann
- - Concluded all living things were made up of cells
- Virchow
- - Proposed cells came from other cells