create a dichotomous key tree to identify these bacteria: Proteus vulgaris Edwardsiella tarda Enterococcus faecalis Escherichia coli Bacillus sphaericus Pseudomonas aeruginosa Morganella morganii Bacillus cereus Staphylococcus aureus Enterobacter aerogenes Bacillus megaterium Klebsiella pneumoniae Shigella flexneri these tests were used: Shape Gram Staining EMB Medium MSA medium Can it create spores Oxygen TSIA Slant Motility Catalase Citrate Lactose Oxidase Sucrose Glucose Mannose Starch Phenylalanine Deaminase Urease MR VP Indole Nitrate .