1. Antonie van Leeuwenhoek (1632-1723) and Robert Hooke (1635-1703)- Hooke: Coined the term "cell" (1665) after observing cork cells under a microscope.- Leeuwenhoek: Observed and described microorganisms, including bacteria and protists (1676).2. Matthias Jakob Schleiden (1804-1881) and Theodor Schwann (1810-1882)- Schleiden: Discovered plant cells and proposed the cell theory (1838).- Schwann: Discovered animal cells and supported Schleiden's cell theory (1839).3. Rudolf Virchow (1821-1902)- Virchow: Proposed the concept of biogenesis (1858): "Omnis cellula e cellula" (every cell comes from a cell).- Described cell division and the role of cells in disease.Distribution of Discoveries:- Cell structure: Hooke, Schleiden, Schwann- Cell theory: Schleiden, Schwann, Virchow- Microorganisms: Leeuwenhoek- Biogenesis: Virchow- Cell division and disease: VirchowTimeline:- 1665: Hooke coins the term "cell"- 1676: Leeuwenhoek observes microorganisms- 1838: Schleiden proposes cell theory- 1839: Schwann supports cell theory- 1858: Virchow proposes biogenesis