Here are some key characteristics of prokaryotes:

* No nucleus: Their genetic material (DNA) is located in a region called the nucleoid, but it's not enclosed by a membrane.

* Simple structure: They have a simpler internal structure compared to eukaryotic cells, lacking membrane-bound organelles like mitochondria and Golgi apparatus.

* Smaller size: Prokaryotes are generally much smaller than eukaryotic cells.

* Examples: Bacteria and archaea are the two main domains of prokaryotes.

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