If a working ant or other neuter insect had been an ordinary animal, I should have unhesitatingly assumed that all its characters had been slowly acquired through natural selection; namely, by individuals having been born with slight profitable modifications, which were inherited by the offspring, and that these again varied and again were selected, and so onwards.
Inurri langilea edo beste intsektu neutro bat animalia arrunta izan balitz, zalantzarik gabe onartu nukeen haren ezaugarri guztiak astiro-astiro hautespen naturalaren bidez erdietsi zirela;