And this fact shows that a character, which is generally of generic value, when it sinks in value and becomes only of specific value, often becomes variable, though its physiological importance may remain the same.
Eta egitate honek erakusten du, normalean balio generikoduna den ezaugarri bat, balioan behera egin eta balio espezifikodun bilakatzen denean, sarri aldagarri bihurtzen dela, haren garrantzi fisiologikoak lehengo bera izaten segi dezakeen arren.