Although all the individuals of the same species differ in some slight degree from each other, it would often be long before differences of the right nature in various parts of the organisation might occur.
Espezie bereko banako guztiek elkarrengandik pixka bat ezberdinak diren arren, sarri askotan denbora asko igaro beharra legoke organizazioaren parte ezberdinetan behar bezalako ezberdintasunak agertu orduko.