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Revision as of 18:48, 12 October 2002 by 152.163.189.199 (talk) (the cell theory is....)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)CELL THEORY: 1. All organisms are composed of one or more cells. 2. The cell is the basic unit of organization of organisms. 3. All cells come from preexisting cells.
Microscopes continued to be improved upon by scientists that studied cells. As a result, the scientists could see closer and begin to understand the internal structures of an individual cell. The internal structures of a cell are called organelles, which means "little organs." Just as our bodies are made up of organs, the "bodies" of cells are made up of organelles.
- There are two basic types of cells:
PROKARYOTE- does not have a nucleus or membranes surrounding its organelles. Ex: bacteria EUKARYOTE- does have a nucleus and organelles with membranes surrounding them. Ex: plants, animals