According to the endosymbiotic theory mitochondria are the ancestors of free living organisms, single celled, that were incorporated into the proto-eukaryotic cells and came to live inside such cells.
So, a cell within a cell!
According to the endosymbiotic theory mitochondria are the ancestors of free living organisms, single celled, that were incorporated into the proto-eukaryotic cells and came to live inside such cells.
So, a cell within a cell!
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