Prokaryotic Organism:

* E. coli (Escherichia coli): This is a common bacterium found in the human gut. It is a single-celled organism with a simple structure, lacking a nucleus and other membrane-bound organelles.

Eukaryotic Organism:

* Human (Homo sapiens): We are multicellular organisms with complex cells that contain a nucleus, mitochondria, and other organelles.

Let me know if you'd like more examples or want to learn more about the differences between prokaryotes and eukaryotes!