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..

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

Figure 1-1

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

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

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

The cell biology time line Figure 1-2

Table 1-1

Figure 1-4

Figure 1B-1