What do the Gram stain, the acid-fast stain, and the endospore stain have in common?

A. The staining outcome varies with the charge of the cell wall.
B. They use a negative stain technique.
C. They are used on a wet mount of the specimen.
D. They are differential stains.
E. They use heat to force the dye into cell structures.


Answer: D

Biology & Microbiology

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