1. Prokaryotes
What are the similarities and differences between Archaea and Bacteria?

2. Oxygen Requirements
Prokaryotes can be grouped based on their need for oxygen
Obligate anaerobe – poisoned by oxygen
Obligate aerobe – require oxygen
Facultative aerobe – can survive with or without oxygen

3. Other Structural Features
Bacteria
Archaea
Shape
DNA
Movement
Other Structural Features
Cell Walls
Bacilli – rod shaped
Spirilla – spiral shaped
Cocci – spherical shaped
Many different shapes
In form of a circle; may contain plasmids
Glide or use flagella
Pili to stick to surfaces and other prokaryotes
Have peptidoglycan (turns purple with Gram stain)
Do not have peptidoglycan (turns pink with Gram stain)

4. Adaptations for Survival
Gene Exchange
Most reproduce asexually, but occasionally conjugation can occur
Allows for genetic diversity
Endospore formation
Thick wall that prevents drying out or being broken down