1. Concept Question 1: What is one major difference between bacterial and archeal cell walls? A bacterial cell wall contains peptidoglycan BUT an archaeal cell wall contains a related substance called pseudopeptidoglycan.

2. Concept Question 2: What is are two major differences between Gram + and Gram - cell walls?

3. Minute Question: What one point about prokaryotic cell composition, structure, morphology requires additional clarification?

4. I would like some apple pie for desert. The Arizona dessert is really dry. Avoid spelling errors like this one. Don’t depend on spell check only.

5. There is a difference between something that does not exist and something that cannot be found.

6. Archaea vs. bacteria Very difficult to define in many ways Both groups very diverse Overlapping The definitive differences are at the DNA level; rDNA Membrane composition is another important feature.

8. Question: If those microorganisms can survive extreme conditions then why would it not be safe to assume their existence in the universe like on Europa or other places? Answer: They are probably out there and we would find them if we knew what to look for.

9. Question: What are some large differences between bacterial cells and fungal cells? Answer: Let’s continue to work on the following list. FeatureBacteriaFungi Cell organizationProkaryoticEukaryotic Cell wallPeptidoglycanChitin