How have electron microscopes helped our understanding of cells and cell processes?

Electron microscopes provide higher magnification, higher resolution, and more detail than light microscopes. The unified cell theory states that one or more cells comprise all organisms, the cell is the basic unit of life, and new cells arise from existing cells

Explanation:

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;