Question

Bacteria, Archaea, Chloroplasts, and Mitochondria reproduce by binary fission. Explain why. (paragraph)?

Answer 1

The reason can be explained by Endosymbiotic Theory.

The endosymbiotic theory deals with the origins of mitochondria and chloroplasts, two eukaryotic organelles that have bacteria characteristics. Mitochondria and chloroplasts are believed to have developed from symbiotic bacteria, specifically alpha-proteobacteria and cyanobacteria, respectively.

Bacteria are prokaryotic organisms that reproduce asexually. Bacterial reproduction most commonly occurs by a kind of cell division called binary fission

Since evolutionarily Bacteria, Archaea, Cloroplasts and Mitochondria are very closely related it explains why they reproduce by binary fission.

Other evidences in favour of endosymbiotic thoery are

Membranes — Mitochondria have their own cell membranes, just like a prokaryotic cell does.DNA — Each mitochondrion has its own circular DNA genome, like a bacteria's genome, but much smaller. This DNA is passed from a mitochondrion to its offspring and is separate from the "host" cell's genome in the nucleus.