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In the Gram-staining procedure, the decolorizer is __________.

In the Gram-staining procedure, the counter stain is __________.

The Gram-staining procedure is an example of __________.

Antiseptic surgery was pioneered by _______.

If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be _________.

The endosymbiotic hypothesis is generally accepted as the origin of eukaryotic organelles.

If you forgot to apply the safranin stain while performing a Gram stain, which outcome would you expect?

Invisible living creatures were thought to exist and cause disease long before they were ever observed.

Prior to staining, smears of microorganisms must be heat-fixed in order to __________.

Who is credited with developing and documenting the first vaccination procedure against smallpox?