The endosymbiotic theory
suggests that all cells depend on one another
suggests that a prokaryote ate another prokaryote to produce eukaryotes
was supported by carl woese
was supported by similarities between prokaryote and eukaryote nuclei

The answer to the fill in the blanks question presented above would be the statement ' suggests that all cells depend on one another'. The endosymbiotic theory suggests that all cells depend on one another. All the other choices are not enought to support the claims of the theory.

The correct answer is scanning electron microscope.

This type of microscope uses electrons to get a detailed view of the surface of a specimen and as the question states, is the most powerful microscope. Transmission electron microscopes are also very powerful, but aren’t as effective for viewing the surface of a specimen. Classroom microscopes are not very powerful and do not allow for such detailed viewing.

Hope this helps!