For 10 points, name this domain of organisms which includes methanogens and many extremophiles, which are more closely related to eukaryotes than bacteria.
One model organism of this type produces four forms of rhodopsin, including one used to create a proton gradient for ATP synthesis. Another organism of this type uses 2-oxoacid ferredoxin oxidoreductase in place of its missing alpha-ketoglutarate dehydrogenase gene, allowing it to carry out aerobic reactions. That species is Aeropyrum pernix. One group of these organisms uses either acetate or hydrogen as a source of energy, producing a major source of marsh gas as output. Their cell membranes often contain (*) ether-linked lipids and their cell walls lack peptidoglycan. For 10 points, name this domain of organisms which includes methanogens and many extremophiles, which are more closely related to eukaryotes than bacteria.
One model organism of this type produces four forms of rhodopsin, including one used to create a proton gradient for ATP synthesis.
{archaea}