Evidence exists (especially in dinoflagellates) that mitosis evolved from binary fission. For example, in certain eukaryotic cells during mitosis, DNA is attached to the membrane of the nucleus (much like a circular chromosome of a bacterium is attached to the plasma membrane).

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Mitosis is believed to have evolved from binary fission, as evidenced by certain eukaryotic cells where DNA is attached to the nuclear membrane, similar to how circular bacterial chromosomes are attached to the plasma membrane during binary fission.

Evidence Exists (Especially in Dinoflagellates) That Mitosis Evolved from Binary