Division of the primary nucleus of Acetabularia.
D000076:Acetabularia / Q000502:physiology*; D002455:Cell Division; D002466:Cell Nucleolus / Q000502:physiology; D002467:Cell Nucleus / Q000502:physiology; D000460:Chlorophyta / Q000502:physiology*; D002875:Chromosomes / Q000648:ultrastructure