Microscopes (SC.912.L.14.4)

For which of the following would a transmission electron microscope be the best type of microscope to use?
A. Studying the structures of a live paramecium
B. Looking at the surface features of a virus
C. Seeing animal tissue that is visible to the naked eye
D. Viewing a cell's mitochondria in detail

D. Viewing a cell's mitochondria in detail