Cell Theory, Structures and Function
Table of Contents
Cell Theory
Cells
Definition
- Smallest living unit.
- Most are microscopic.
- The detailed structure of a cell has been studied under compound microscope and electron microscope.
Characteristics
- It has a surrounding membrane.
- It has a control center with DNA.
- Structures for cell function.
History
- It took over 173 years for cell theory to be formulated.
- Discovery of Bacteria
- Foundation of cell theory
Definition
The 3 Building Blocks
- All organisms are composed of one or more cells. (Unicellular or Multicellular).
- The cell is the basic unit of life.
- Cells arise from pre-existing cells.
Modern Version
- Energy flow occurs within cells.
- DNA is passed from one cell to another.
- All cells have the same basic chemical composition.