If, with all the aids of art, these slight differences make a great difference in cultivating the several varieties, assuredly, in a state of nature, where the trees would have to struggle with other trees and with a host of enemies, such differences would effectually settle which variety, whether a smooth or downy, a yellow or a purple-fleshed fruit, should succeed.
Antzearen laguntza guztiekin aldaki ezberdinak lantzean alde txiki hauek alde handia badakarte, zalantzarik gabe natur egoeran, zuhaitzek beste zuhaitzekin eta etsai andana batekin borrokatu beharra duten lekuan, alde hauek eraginkortasunez erabakiko dute zein aldaki aterako den garaile, fruitu leun ala biloxkaduna, mami horiko ala mami moreko fruitua.