Final answer:
Fluorescence microscopy enables the observation of cellular, nuclear, and protein structures by using fluorescent dyes to stain and visualize various components within the cells.
Step-by-step explanation:
With fluorescence microscopy, you can observe various structures within cells, including cellular structures, nuclear structures, and protein structures. This type of microscopy uses fluorescent stains that attach to different components of the cell, allowing them to be visualized. For example, DNA can be stained cyan, microtubules green, and the Golgi apparatus orange. This technique allows for the study of the endomembrane system, cytoskeleton, and other cellular components. It offers a powerful tool for identifying and understanding the structure and function of microorganisms and other cellular entities.