On the other hand, the transportal of the lower eye of a flat-fish to the upper side of the head, and the formation of a prehensile tail, may be attributed almost wholly to continued use, together with inheritance.
Aitzitik, arrainzapalaren azpiko begia buruaren gaineko aldera ekartzea eta buztan oraitzailearen formakuntza, ia erabat erabilera jarraikiari iratxeki dakioke, herentziarekin batera.