maybe it helped people with health and skin care so maybe it inspired them to also use it for hair and it worked I hope this is something that atleast helped you sorry if it seems stu-pid
During human evolution, there was natural selection for the loss of body hair, as it enabled them to better stay cool and to therefore hunt throughout the day.
Early humans went from bodies covered in hair (Ex. Chimpanzee) to having mostly hairless bodies, excluding the heads and other areas.
Bacteria has a primitive type of RNA polymerase while archaeal RNA ploymerase is more advanced and complex than that of bacterial. The structure of archaeal RNA ploymerase has more resemblance with RNA polymerase II of eukaryotes. The RNA polymerase of bacteria requires sigma factor for transcription initiation whereas the RNA ploymerase of archaea requires transcription factors for transcription initiation just like eukaryotes.