The evolutionary origin of mitochondria is demonstrated by which of the following key genomic characteristics?
A) variable numbers of protein-encoding genes
B) large stretches of AT-rich DNA
C) linear and circular genome structure in different organisms
D) rRNA genes most closely related to Bacteria

Question

Quizplus · Accepted Answer

The fact that the rRNA genes of mitochondria are most closely related to Bacteria provides strong evidence that mitochondria evolved from an endosymbiotic relationship with a bacterial ancestor. This is because rRNA sequences are highly conserved and used to trace evolutionary relationships. The other characteristics listed do not necessarily relate specifically to the origin of mitochondria.

The Evolutionary Origin of Mitochondria Is Demonstrated by Which of the Following