What component in mannitol salt agar is selective for Staphylococcus bacteria?

A culture medium with numerous complex chemical ingredients in unknown proportions is known as a/an:

What ingredient in MacConkey agar makes the medium differential for carbohydrate fermentation?

What culture medium is often used to selectively isolate Gram-negative and enteric bacteria?

What letter in the photograph below of inoculated Columbia CNA with 5% sheep blood agar illustrates beta hemolysis?

If indole is produced by bacteria in SIM medium it results from the hydrolysis of:

The gas that is formed when sulfur is reduced by bacteria and is used to determine if sulfur has been reduced is:

The following diagram represents a + starch hydrolysis test result. (Test Result: "halo"/clearing around bacteria after addition of iodine)   

α-amylase is an enzyme that can:

Which of the tubes with SIM medium in the photograph below contains bacteria that are motile +, indole -, and H₂S -?