1. Copyright © 2009 Pearson Education, Inc..
The
World
of the
Cell
Wayne M. Becker
Lewis J. Kleinsmith
Jeff Hardin
Gregory Paul Bertoni
Seventh Edition
Chapter 1
A Preview
of the Cell
Copyright © 2009 Pearson Education, Inc..

2. Cell Theory It was postulated by Schwann in 1839
The cell theory had two basic principles
* All organisms consist of one or more cells
* The cell is the basic unit of structure for all organisms
A third principle was added by Rudolf Virchow in 1855
* All cells arise only from preexisting cells

3. Figure 1-1

4. Units of Measurement in Cell Biology A. Micrometer
Figure 1A-1

5. Units of Measurement in Cell Biology B. Nanometer
Figure 1A-2

6. The Emergence of Modern Cell Biology
It involves the weaving together of three different strands
Cytology
Biochemistry
Genetics

7. The cell biology time line
Figure 1-2

8. Table 1-1

9. Figure 1-4

10. Figure 1B-1