Questions for Archaea List the differences between Bacterial and Archaeal Cell Membrane and Cell Walls. What archaea have you learned so far? Where to isolate halophilic Archaea? What are the physiological features of halophiles? What are the three major classes of mathane-producing archaea? List several species of methane-producing archaea you have learned. List several unique methanogenetic coenzymes we have learned. Describe the general properties of hyperthermophilic archaea you have learned. Describe at least four hyperthermophilic archaea you have known. There are two bacteria that exhibits hyperthermophilic tendencies. Describe them a bit. What is Thermoplasma? What seems to be the maximal temperature for life to exist? Why it is said that archaea may be the earliest life on earth?