Penicillin is an antibiotic that was discovered in 1928. today, many species of bacteria have acquired resistance to penicillin. this adaptation occurred as the result of answers available in 3 take this time to do your best on this question. a) mutualism. b) symbiosis. c) genetic mutation. d) divergent evolution.

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls