Prokaryotic Cell Diagram
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.
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