text: which came first the chicken or the egg?   any "egg" must as a neccessity for procreation contain diversity. any a-sexual being can only produce a duplicate of its own species, so in either case at least one chicken must have been present otherwise no egg could have been produced. and also since i am not aware of any stage of evolution where a species has become a-sexual, two chickens must have been present. and that last note is important as chickens are far more advanced in current evolutionary theory than say single-cell amoebas, and are regarded to have begun well-after such a-sexual life dominated.