Why is visualization of biological specimen important

1. Describe light microscopy and its advantages and limitations.
2. What techniques and strategies are being used to improve visualization of specimens through light microscopy?
3. Describe Fluorescense Microscopy. On what aspects did it improve on the previous technique? What are its limitations?
4. What are the sources of error in fluorescence microscopy and how to mitigate these?
5. Describe TEM. How is it different from microscopes utilizing light?
6. Why is visualization of biological specimen important?