We hear this phrase several times when the Borg are about to assimilate a group. But what does it mean, exactly? I mean, sure, the technological part is 'easy': you assimilate species x, you gain its knowledge and hence its technology, which, from that point on, you can start using throughout the Collective. But what about the biological in their statement? Suppose the Borg assimilate a race, born with super strength. From now on do they simply have a limited number of drones (originally from that species), possessed with that super strength - but never any more than that? Or do the Borg analyse that 'biological distinctiveness' and really 'add it to their own', i.e. all drones get an upgrade (or at least the ones the Collective considers it relevant for)?