what bacteria are believed to be the origin of mitochondria and chloroplasts
Both the mitochondria and chloroplast are believed to have prokaryotic origins. They are commonly believed to once have been bacteria that were engulfed by eukaryotic cells wh â¦ ere they lived together with a mutualistic relationship.oth the mitochondria and chloroplast are believed to have prokaryotic origins. They are commonly believed to once have been bacteria that were engulfed by eukaryotic cells wh â¦ ere they lived together with a mutualistic relationship.