<span>The best and most correct answer among the choices provided by the question is the fourth choice "all of the above"
<span>Bacteria vary from species to species, thus assigning many common traits to bacteria is difficult. Bacterial species are typified by their diversity. There are three notable common traits of bacteria, 1) lack of membrane-bound organelles, 2) unicellular and 3) small (usually microscopic) size.</span>
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