Question

Mitochondria and chloroplasts have their own DNA, which supports the idea that they were once independent organisms. true or false

Answer 1

True. The presence of their own DNA in mitochondria and chloroplasts supports the endosymbiotic theory, which suggests that these organelles were once independent prokaryotic organisms that were engulfed by ancestral eukaryotic cells. This theory explains their double membrane structures and similarities to bacteria, as well as their ability to replicate independently of the cell in which they reside.