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John has a mixed culture and needs to determine the number of different species are in the tube. All of the following would work except

Which of the following is included as an indicator in Kligler’s Iron agar?

Sam is performing a Gram stain on a known Gram-negative sample. During the procedure, he forgets to decolorize but does use the counterstain. What color will his Gram-negative cells be?

Ferric chloride is added to an inoculated an incubated phenylalanine slant and produces a green color. Is this positive or negative for phenylalanine deaminase?

What is observed when a microorganism does not ferment lactose in a sugar fermentation (PR) lactose broth medium, but does utilize the peptone also in the medium?

The inhibitor(s) in MacConkey ager is(are)

When performing the viable plate count procedure, the countable range is _____ to ______. 

Jenn inoculates an unknown sample on an eosin methylene blue agar plate. Following incubation, there is good growth that appears dark and has a green metallic sheen when moved around in the light. Which of the following is likely true of the sample?

An endospore stain performed on which of the following organisms would show spores?

After properly performing the Gram stain, a cell with a thick cell wall should be