But the important fact for us is that, though the workers can be grouped into castes of different sizes, yet they graduate insensibly into each other, as does the widely-different structure of their jaws.
Baina guretzat garrantzia duen egitatea honako hau da, langileek, tamainu diferenteko kastetan sailka badaitezke ere, beren artean mailaketa sentigaitzak egiten dituztela, beren baraila oso diferenteen egituren artean bezalaxe.