Final answer:
Staining procedures were developed to enhance the visualization of cells under a microscope. Dyes and staining techniques add color to cells, making them easier to observe. Different stains can help differentiate between organisms and highlight specific structures.
Step-by-step explanation:
Staining procedures were developed to enhance the visualization of cells and their structures under a microscope. Different dyes and staining techniques are used to add color to cells, making them easier to observe. Positive stains are absorbed by the cells, highlighting the structures of interest, while negative stains are absorbed by the background, creating an outline of the cells. Staining techniques, such as simple staining and differential staining, can help differentiate between different types of organisms based on their interactions with specific dyes.