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When unwanted microorganisms of unknown origin appear in a culture of known identity, the culture is said to be what?

The total magnification of the oil immersion lens is

If a colony is not contacting other colonies, it is said to be ___________ and a portion of it can be transferred to a sterile medium to start a pure culture of the species.

What type of media encourages the growth of certain types of organisms while inhibiting the growth of others?

The security protection item that ensures that the individual is who they claim to be (the authentic or genuine person) and not an imposter is known as?

MSA media allows differentiation between Staphylococcus species based on the ability to ferment

There are 4 different bacteria inoculated on this media. E. coli is streaked at the top position (twelve o’clock). Therefore, which media is this?

The total magnification of the low power lens is

You have worked up a patient who you believe has an iris melanoma.  The doctor wants you to do a B scan to confirm this diagnosis.  There are 2 B scan machines in your office; a 10 MHz and a 30 MHz B scan.  Which one will you use to see the presumed iris tumor and why?  

A relationship where the microbe may actually benefit their host is termed