Help for hw so need this question asked. Why might a a stain be needed to see cell parts under a microscope?

Question

Help for hw so need this question asked. Why might a a stain be needed to see cell parts under a microscope?

Answer 1

To treat (specimens for the microscope) with a reagent or dye that makes visible certain structures without affecting others.

Answer 2

Because otherwise, some parts of the cell would seem transparent, or the contrast would be really low.

To quote from wikipedia:

"Stains and dyes are frequently used in biology and medicine to highlight structures in biological tissues for viewing, often with the aid of different microscopes. Stains may be used to define and examine bulk tissues (highlighting, for example, muscle fibers or connective tissue), cell populations (classifying different blood cells, for instance), or organelles within individual cells."