Fermented tofu will not keep indefinitely but has a significant shelf-life of between six months to a year. The fermentation process continues, even if refrigerated, and it will reach a point beyond which it will be inedible. This expiration date is often determined by the type of ferment, as some ferments can take six months just to reach maturity.
You cannot start a bee colony with a queen bee alone. A bee colony is a community of bees, where different bees have different functions, and they all depend on one another to fulfill their part for the colony to survive. The queen is pretty much helpless on her own and will not survive on her own, nor be able to build a colony without other bees.