Homework Summarizing concepts 1 and 2 pg 477

Character Ed "Support bacteria - they're the only culture some people have." — Steven Wright

Objectives – Test Chapter 17 – Distinguish between Archaea and bacteria. – Describe the structure of bacteria.

Bacteria Chapter 23

Bacteria Prokaryotic 2 Domains – Archaea – Bacteria (Eubacteria)

Archaea No peptidoglycan – protein that is found in bacteria cell walls 3 Archaea groups – Methogens – use methane for energy – Halophiles – “salt-loving” live in places like the Dead Sea – Thermophiles – live in acidic environments with high temperatures

Bacteria Do have peptidoglycan 3 shapes – Round – cocci – Rod – bascilli – Spiral - spirilla

Gram Stains Gram Stain – technique of staining the bacteria cells that is based on cell wall composition – Peptidoglycan – Gram + and is stained purple – Little Peptidoglycan – Gram- and is stained red