But how is it that many of the immigrants have been differently modified, though only in a small degree, in islands situated within sight of each other, having the same geological nature, the same height, climate, etc?
Baina zer dela eta aldatu dira era ezberdinean, maila apalean bada ere, etorkin horietariko asko, bata bestetik bistan dauden eta geologi izaera bera, altitude bera, klima bera, etab., duten irlotan?