Prokaryotes are a kind of cell that lack a nucleus. Eukaryotes are the opposite kind of cell, those that do have a nucleus. Most prokaryotes are made up of only a single cell, although there are exceptions. Prokaryotes are found in all sorts of environments, from those perfectly suited to humans to those completely inhospitable. If a nuclear war were to end humanity as we know it, prokaryotes might be the cells that survived to create the next beings that take over our planet.

I hope that this information was useful to you!!  Feel free to check out some of my other hubs!!