What is the purpose of the oil/water when using the oil/water immersion lens?

Why do smears need to be heat fixed?

What is meant by the term “isolated colony”?

Which of the following temperatures would most likely kill a mesophile?

1. Is the organism in the picture below gram positive or gram negative?  (It has a purple color.) 2. What is the morphology of the cells shown on the slide? 3. Could this culture potentially be Escherichia coli or not? Why or why not?

What is the purpose of the safranin in the endospore stain?

What does an endospore do for the cell?

Salts and sugars work to preserve some foods by acting through

Why is it important to temper the agar temperature to 50° C when using melted agar?

Where should the lid to the tube be when you are getting an inoculum?