Sort the following events in the history of cell biology in chronological order.

(1) First light microscopes constructed by Leeuwenhoek

(2) Hooke describes cells in cork

(3) Schleiden explains cell theory for plants

(4) Schwann extends cell theory to animals

(5) Electron microscope developed

Explanation

Chronological order of key milestones:

1. 17th century — Leeuwenhoek constructs the first light microscopes
2. 1665 — Hooke describes cells in cork
3. 1838 — Schleiden explains cell theory for plant cells
4. 1839 — Schwann extends cell theory to animal cells
5. Early 1930s — Electron microscope developed, enabling much greater magnification and resolution