Biology 211 ~ SI Worksheet #2 ~ www.si.iastate.edu ~ 8/27/07Chapter 27: Prokaryotes1.) Most prokaryotes are ____________ in size and extremely _______________.2.) Prokaryotes are classified into two Domains. What are they?3.) (Concept 27.1) Some prokaryotes are ___________ while other can form true colonies. What are true colonies?4.) What are the three shapes of prokaryotes? Give an example for each.5.) Why is the cell wall important?6.) What unique compound do bacterial cell walls contain that archaea cell walls do not?7.) Explain the importance of the compound in question 6 with regard to the Gram stain procedure.8.) What is a capsule and why is it beneficial to some prokaryotes?9.) What are fimbrae and pili used for?10.) What is taxis?11.) How do prokaryotes differ from eukaryotic cells?12.) How do prokaryotes reproduce and why is reproduction limited?13.) What is an Endospore?14.) Fill in the following table:Mode of Nutrition Energy Source Carbon Source Example OrganismPhotoautotrophChemoautotrophPhotoheterotrophChemoheterotroph15.) Define Obligate Aerobes.16.) Define Faculatative Anaerobes.17) Define Obligate Anaerobes.18.) What is a biofilm?19.) What are the two largest groups of organisms in Domain Bacteria?20.) What are thermophiles, halophiles, and methanogens? What Domain do they belong to?21.) (Concept 27.5) What roles do prokaryotes play in the biosphere? 22.) What are the differences between Mutualism, Commensalism, and Parasitism?23.) What are exotoxins?24.) What is
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