The concentrations of alcohol in beer or wine don't kill yeast, though. The yeast go into a sort of hibernation phase and can be roused with the return of a mor

The concentrations of alcohol in beer or wine don't kill yeast, though. The yeast go into a sort of hibernation phase and can be roused with the return of a more favorable environment. With much beer and wine making, the alcohol doesn't even reach that level; the yeast simply eat everything they're capable of digesting and then hibernate.