Unified cell theory

Definition

Unified Cell Theory states that all living organisms are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells. This theory forms the foundation for understanding cell structure and function.

5 Must Know Facts For Your Next Test

1. The theory was developed by Matthias Schleiden and Theodor Schwann in the 19th century.
2. Rudolf Virchow later contributed to the theory by stating that all cells come from pre-existing cells.
3. It emphasizes that the cell is the fundamental unit of structure in all living organisms.
4. The theory applies universally to both unicellular and multicellular organisms.
5. It laid the groundwork for modern cell biology and advances in medical research.

Review Questions

• Who were the key scientists behind the development of Unified Cell Theory?
• What are the three main components of Unified Cell Theory?
• Why is Unified Cell Theory considered foundational in biology?

Related terms

Prokaryotic Cells: Cells without a nucleus or other membrane-bound organelles.

Eukaryotic Cells: Cells with a nucleus and other membrane-bound organelles.

Cell Division: The process by which a parent cell divides into two or more daughter cells.