For 10 points, name this extreme form of altruistic social organization most commonly observed in hymenopterans.
In 2010, Nowak et al proposed that the second phase in this phenomenon's evolution entails the accumulation of pre-adaptations like progressive provisioning and the occupation of defensible habitats. "Life insurance" and "fortress defense" are alternate manifestations of this phenomenon, which becomes obligate after passing the "point of no return." This phenomenon is regulated by the heteromorphic SB chromosome in Solenopsis invicta, which are stimulated by an odorant binding protein to kill Gp-9 homozygotes that disrupt this phenomenon in a classic example of a (*) green beard. Damaraland and naked mole rats are the only mammals to exhibit this phenomenon, which requires some members of a population to serve as non-reproductive workers and was once thought to result from relatedness asymmetry caused by haplodiploidy. For 10 points, name this extreme form of altruistic social organization most commonly observed in hymenopterans.
In 2010, Nowak et al proposed that the second phase in this phenomenon's evolution entails the accumulation of pre-adaptations like progressive provisioning and the occupation of defensible habitats.
eusociality [accept superorganisms or word forms; accept life insurance or fortress defense before mentioned; prompt on any answers related to being "social;" prompt on "altruism" or "kin selection" or "inclusive fitness" or "cooperation" or related answers about helping others; prompt on "haplodiploidy" before mentioned; prompt on "colony formation" or "caste systems" or "hierarchy" or "heterarchy" or related answers; prompt on answers about queens or workers or other caste roles before mentioned]