1. Bacteria Notes Page 266

2. Bacteria: Prokaryotes, so single- celled organisms without nucleus and other organelles like mitochondria

3. Flagella: A long, whip-like structure that helps the cell move

4. Size and Shape: Vary in size Spherical (cocci) Rod-like (bacilli) Spiral (spirochete)

5. Food autotrophs heterotrophs Some are autotrophs (make food from sun or chemicals) and some are heterotrophs (consume other food) When your milk or meat spoils, it’s because a heterotroph has been eating it!

6. Gram Staining A chemical process to classify different bacteria Gram + Gram + have thick peptidoglycan and 1 membrane Gram – Gram – have thin peptidoglycan but 2 membranes

7. E. Coli (-) and S. aureus (+)