1. Bacteria It’s everywhere!!

2. What do these two things have in common? YogurtSwiss Cheese

3. What other foods can you think of that might be prepared with the aid of bacteria? Buttermilk Cottage cheese Sauerkraut Sour cream

4. Not discovered until the late 1600’s. Anton van Leeuwenhoek found bacteria by accident – He made microscopes – Looked at scrapings of his teeth

5. Bacteria are prokaryotes (genetic material not in a nucleus) Are still considered living

6. Cell Shapes Come in three shapes – Spherical – Rodlike – Spiral

7. Cell Structure The cell wall determine the shape of the bacteria and protects the cell Cytoplasm: inside the cell where genetic material is located Ribosomes: proteins are produced Genetic material contains the instructions for all the cell’s functions Flagellum: whiplike structure that helps the cell move. (spins in place like a propeller)

8. 2 types of bacteria Archaebacteria: live in extreme environment like the Great Salt Lake, mud at bottom of swamps, and sewage. –B–Bacteria are what cause the bad smells at these places Eubacteria: live everywhere else. Most are useful or harmless

9. Reproduction of Bacteria When conditions are perfect multiply every 20 minutes Reproduce by binary fission Binary Fission: process in which one cell divides to form two identical cells. Can also reproduce by conjugation Conjugation: one bacterium transfers some genetic material to another and then seperate