It is hypothesized that mitochondria in eukaryotic cells evolved by endosymbiosis, when a larger cell ingested a smaller cell. If you were examining eukaryotic cells using a high powered microscope, what evidence would you look for that would best support this hypothesis?
a. Nuclei within the mitochondria
b. Chloroplasts within the mitochondria
c. Two membranes around each mitochondrion
d. A rupture in the membrane of the cell
e. A second cell within each mitochondrion
Answer: c. Two membranes around each mitochondrion