Fluorescent aptamers like FAST are used as genetic reporters in organisms that have this trait since GFP’s fluorophore cannot form in them. Biogasification relies on bacteria with this trait. Organisms with this trait live in the mud at the bottom of a Winogradsky column. (20[1]0[2])A mass extinction (0[1])of organisms with this trait 2.4 billion (20[1])years ago coincided (20[2]0[2])with the rise (20[1]0[1])of cyanobacteria. (20[6]0[3])Bacteria with this trait, (20[1]0[1])like the (*) methane producers (10[1])that live inside ruminants, must be cultured (10[1])inside a glovebox. (10[1])Whereas Clostridia and sulfate-reducing bacteria have the obligate (10[1])form of this trait, Salmonella have a facultative form of it, since they can switch away from fermentation. For 10 points, name this property of cells (10[1])that live (0[1])without oxygen. (10[6]0[1])■END■ (10[10]0[2])