Final answer:
An appropriate stain for blood cells, starch, DNA, fungal spores, nuclei of animal cells, and cellulose is the Wright-Giemsa stain, which differentially stains blood cells. Basic dyes like methylene blue or crystal violet are also used for staining other cell components.
Step-by-step explanation:
An appropriate stain for improving the definition of blood cells, starch, DNA, fungal spores, nuclei of animal cells, and cellulose is the Wright-Giemsa stain. This particular differential stain enhances the visibility of different structures within blood cells by staining them different shades based on their characteristics. Red blood cells are stained a pinkish-red color, while the nucleus and cytoplasm of white blood cells are stained various shades of purple. For observing components such as DNA and fungal spores, a basic dye like methylene blue can be beneficial due to its affinity for acidic components in the cell walls and structures.
Additionally, stains are chosen following the chemical properties with basic dyes like methylene blue, crystal violet, and malachite green being positive stains that bind to the cells. Acidic dyes such as eosin and India ink are negative stains that provide a silhouette of the cell structures. With these dyes, cells are visually inspected under a microscope after being fixed onto a glass slide through a staining procedure.