Which is true of mitochondria? A. Mitochondrial symbiogenesis (establishment of a mitochondrion from a bacterial endosymbiont), occurred once in the common ancestor of all eukaryotes. B. Some living eukaryotes lack mitochondria, and these are considered primitive. They represent an early stage of eukaryotic evolution. C. ALL living eukaryotes have fully-functional mitochondria that carry out oxidative metabolism (citric acid cycle and electron transport chain). D. Mitochondria are clearly derived from bacteria.
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Step 1: Mitochondrial symbiogenesis occurred once in the common ancestor of all eukaryotes. Show more…
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