Naked mole rats have several morphological as well as behavioral adaptations which allow them to live in a eusocial system within a harsh and unforgiving environment How would an evolutionary biologist explain how these unique characteristics evolved from ancestors who did not possess these traits? (Note: The term eusocial as defined by Krebs and Davies (1993) includes animals that exhibit: 1) cooperative care of the young; 2) a reproductive division of labor - that is, some castes or classes are less fecund or sterile; 3) overlap of at least two generations; that is, the offspring assist the parents during some period of their life.)