Here's why:

* Prokaryotes are single-celled organisms that lack a membrane-bound nucleus and other membrane-bound organelles.

* Archaea (formerly known as Archaebacteria) are a domain of single-celled organisms that are distinct from bacteria and eukaryotes.

Key characteristics of prokaryotic cells:

* No nucleus: Their DNA is located in a region called the nucleoid, but it's not enclosed within a membrane.

* No membrane-bound organelles: They lack structures like mitochondria, Golgi apparatus, endoplasmic reticulum, etc.

* Smaller size: Generally much smaller than eukaryotic cells.

* Simple structure: Have a relatively simple internal structure.

It's important to note:

* Archaea are now considered a separate domain from Bacteria, although both are prokaryotes.

* Archaea have some unique characteristics that distinguish them from bacteria, such as their cell wall composition and their ability to thrive in extreme environments.

Let me know if you have any more questions!