Answer:
1. Highlight differences between cells or parts of a cell
Explanation:
When two or more chemicals stains are used together for the purpose of staining then these stains are termed as Differential stains and the process as Differential staining.
Differential stains are often used because due to presence of multiple stains it becomes easy to differentiate different structures or parts of a cell or cellular organism. Since each stain stains different parts of the cell or microorganism, under the microscope we can see the cell parts stained by separate colours.
Crystal violet and Fuchsin are an example of differential stains. These are used in gram staining.
