Original: This unusual situation where females may have greater fitness when they help rear siblings rather than producing offspring is often invoked to explain the multiple independent evolutions of eusociality ( occurring some 11 separate times ) within the haplodiploid group Hymenoptera -- ants , bees and wasps .
Simplified: This unusual situation where females may have greater fitness when they help rear siblings rather than producing offspring is often used to explain that eusociality evolved several times , independently in the haplodiploid group Hymenoptera -- ants , bees and wasps .