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A. Arg caused the P. aeruginosa bacteria to lyse under anaerobic conditions and all the polysaccharide slime coated the tube wall. B. Arg stimulated the P. aeruginosa bacteria to make much more polysaccharide slime that coated the tube wall. C. The Arg dissolved the polysaccharide into hydrophobic layers that coated the tube wall. D. The P. aeruginosa bacteria used Arg to grow anaerobically, so that it no longer had to grow at the air-liquid interface, which allowed it to form a biofilm all over the tube wall. E. The hydrophobic Arg in the medium coated the tube wall and was stained with crystal violet dye. W
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