1. Explain how the cell wall protects bacteria against adecrease, but not an increase in the concentration of an externalsalt.
2. Give two reasons why the outer membrane of gram-negativebacteria is significant medically.
3. Desribe different ways by which some prokaryotic cells moveand then discuss different ways by which some eukaryotic cellsmove.
4. Discuss the statement: "The most obvious difference betweeneukaryotic and prokaryotic cells is in their use of membranes."What general roles do membranes play in eukaryotic cells?