9. Microscopes

There are two major types of simple stains used to better visualize microorganisms. What are these two types of simple stains and how do they differ?

Simple staining is a procedure often used to increase the contrast of _____________ microscopes.

Which of the following statements is true?

Assume you stain Clostridium by applying a basic stain, carbolfuchsin, with heat, decolorizing with acid-alcohol, and counterstaining with an acidic stain, nigrosin. Through the microscope, the endospores are 1, and the cells are stained 2.

a. 1—red; 2—black

b. 1—black; 2—colorless

c. 1—colorless; 2—black

d. 1—red; 2—colorless

e. 1—black; 2—red