Answer
Mitochondria and chloroplasts have their own DNA which is separate from the DNA found on the nucleus of the cell. The two organelles use their own DNA to produce proteins and enzymes required for their functions. This phenomena is a strong evidence of endosymbiosis wherein one organism lives inside the other. The double membrane that surrounds the Mitochondria and chloroplasts further prove that they were once organism of their own but were ingested by a primitive host forming an endosymbiotic relationship.
Work Step by Step
Mitochondria and chloroplasts have their own DNA which is separate from the DNA found on the nucleus of the cell. The two organelles use their own DNA to produce proteins and enzymes required for their functions. This phenomena is a strong evidence of endosymbiosis wherein one organism lives inside the other. The double membrane that surrounds the Mitochondria and chloroplasts further prove that they were once organism of their own but were ingested by a primitive host forming an endosymbiotic relationship.
