1.
Section 1: Introduction to Cells <ul><li>Preview </li></ul><ul><li>Bellringer </li></ul><ul><li>Key Ideas </li></ul><ul><li>The Discovery of Cells </li></ul><ul><li>Looking at Cells </li></ul><ul><li>Cell Features </li></ul><ul><li>Summary </li></ul>

2.
Bellringer <ul><li>After viewing the list of items on the board, work with a partner and make two new lists: those items on the list comprised of cells and those items not comprised of cells. </li></ul><ul><li>Give a rationale for each answer. </li></ul>

3.
Key Ideas <ul><li>How were cells discovered? </li></ul><ul><li>Why does cell shape vary? </li></ul><ul><li>What enables eukaryotes to perform more specialized functions than prokaryotes? </li></ul>

4.
The Discovery of Cells <ul><li>ALL living things are made of cells </li></ul><ul><ul><li>Cell Theory </li></ul></ul>

5.
Visual Concept: Cell Theory

6.
Looking at Cells, continued <ul><li>All substances that enter or leave a cell must cross the surface of the cell. </li></ul><ul><li>Bigger surface area = better exchange </li></ul>

7.
Cell Features <ul><li>All cells have a cell membrane, cytoplasm, ribosomes, and DNA. </li></ul><ul><li>The cell membrane is the outer layer that covers a cell’s surface </li></ul><ul><li>The cytoplasm is the region of the cell within the cell membrane, made of a fluid called the cytosol. </li></ul>

8.
Features of Prokaryotic and Eukaryotic Cells

9.
Cell Features, continued <ul><li>Prokaryotic Cells </li></ul><ul><li>A prokaryote is an organism made of a single prokaryotic cell. </li></ul><ul><li>Prokaryotic cells do not have a nucleus. </li></ul><ul><li>For millions of years, prokaryotes were the only organisms on Earth. </li></ul>

10.
Cell Features, continued <ul><li>Features of Eukaryotic Cells </li></ul><ul><li>A eukaryote is an organism made up of one or more eukaryotic cells. </li></ul><ul><li>The DNA of a eukaryotic cell is found in the nucleus . </li></ul>

11.
Visual Concept: Comparing Prokaryotes and Eukaryotes

12.
Comparing Prokaryotes and Eukaryotes