    "Senitence 1: How long ago aid cyanobacteria  entera cell?’    “Settenéa!:2:\Somewsiers “around baie  years ago. a° free-living cyanobacterium  entered an’ early eukaryotic ‘cell. either. as  food of as an internat parasite, but managed  ta.,escape ‘the: phagocytic vacuole it ‘was  containedin. ..*           