Final answer:
False. Plasmids in the same incompatibility group can co-exist in the same cell over long time periods, as long as they have different negative regulatory molecules controlling them.
Step-by-step explanation:
False. Plasmids in the same incompatibility group can co-exist in the same cell over long time periods, as long as they have different negative regulatory molecules controlling them. Incompatibility groups refer to groups of plasmids that encode similar replication and control mechanisms. Plasmids within the same group are unable to coexist within a single cell due to competition for the same regulatory molecules. However, if plasmids belong to different incompatibility groups, they can coexist in the same cell.