1. Cell Theory

2. Characteristics of Living Things
All living things......

3. What is a cell?
A cell is the basic unit of life in any organism. They are also the building blocks of life. One of the first people to observe cells was Robert Hooke. But without microscopes, Hooke couldn't have made history. Microscopes made it possible for people to learn about cells. In fact in 1663, Hooke observed a thin slice of a cork with a compound microscope he had built himself. About the time that Hooke made his discovery, Anton van Leeuwenhoek also began to observe tiny objects.

4. Cork “cells”

5. Cell Theory: 1. All living things are made up of cells.
2. Cells are the basic building blocks of all living things.
3. All cells are produced from other cells.