Do Now: Use your notes and hw 1.What are the 3 shapes of bacteria? 2.What is the function of the capsule? 3.What is a nucleoid?

Where do we find bacteria?

Review What is a prokaryote? –Cells without membrane bound nucleus –Most surrounded by a cell wall –Many secrete a slime capsule- protection –Lack organelles

How big is a prokaryotic cell? 1-5 micrometers A micrometer, also written µm, is one thousandth of a millimeter - it's m.

Classification of Prokaryotes Eubacteria –Surrounded by a cell wall containing peptidoglycan Example: Rhizobium

Classification of Prokartyotes Archaebacteria –Surrounded by a cell wall lacking peptidoglycan Example: Methanogen

How do we identify Prokaryotes? 1.Shape Three groups: 1.Coccus: spherical 2.Bacillus: rod shaped 3.Spirillum: spiral

Motility Flagella Slime secretion Spiral motion

Obtaining energy Autotroph –Makes own food Heterotroph –Ingests nutrients

1.photoautotroph Carry on photosynthesis

2. chemoautotroph Gain energy from inorganic molecules

3. Photoheterotrophs Photosynthesis AND ingestion of organic compounds

Obligate aerobes –Require oxygen Obligate anaerobes –Must live in the absence of oxygen Facultative anaerobes –Can live with or without oxygen

Lets draw

Exit ticket What are the three types of movement for bacteria cells? Give an example of Eubacteria. Give an example of Archaebacteria. What are the three different ways bacteria can obtain energy?