Evidence for the endosymbiotic origin of mitochondria includes
- A
Synthesis of all their proteins by free cytosolic ribosomes
- B
Their absence in all anaerobic eukaryotes
- C
Their identical genetic code with the host nucleus
- Dcheck_circle
Circular DNA, 70S ribosomes, double membrane, and binary-fission replication
Explanation
Margulis's serial endosymbiosis: mitochondria show prokaryote- like features (circular genome, 70S ribosomes, double membrane, fission) — descended from a captured α-proteobacterium.