Imagine that a researcher discovers a new type of organelle in single-celled eukaryotes. She suspects this new organelle is the result of endosymbiosis. How could she support this theory?

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All of these choices could support the theory of endosymbiosis. Electron microscopy could reveal structural similarities between the new organelle and prokaryotes, while the presence of both an inner and outer membrane could indicate that the organelle was once a free-living prokaryote. If the organelle has its own DNA, comparing its genetic sequence to those of certain prokaryotes could reveal similarities that support the endosymbiosis theory. Therefore, all these options collectively could provide strong supporting evidence for the theory of endosymbiosis.

Imagine That a Researcher Discovers a New Type of Organelle