Claim: Micrococcus luteus (a Gram-positive ( used to quickly classify bacteria into two broad categories)) has positive ratings on two tests and negative ratings on four tests.
Evidence: Micrococcus luteus is a Gram-positive, to Gram-variable, nonmotile, coccus, tetrad-arranging, pigmented, saprotrophic bacterium that belongs to the family Micrococcaceae. In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram Stain Positive (+) Catalase Positive (+) Acid from Glucose Negative (-) (Yellow Pigment) Motility Negative (-) nonmotile Nitrate Reduction Negative (-) reaction to Nitrate Urease Negative (-)