If you don't need change, maybe you don't need sex.
Ekelund
Flemming
F
Rønn
Regin
R
D000818:Animals; D005075:Biological Evolution; D056890:Eukaryota / Q000502:physiology; D005057:Eukaryotic Cells / Q000502:physiology*; D006801:Humans; D012100:Reproduction, Asexual / Q000235:genetics / Q000502:physiology*; D012403:Rotifera / Q000502:physiology