Which of the following is an example of a prokaryote?

Bacteria are classified as prokaryotes because they lack a membrane-bound nucleus and other membrane-bound organelles. Instead, their genetic material is located in a region called the nucleoid, which is not enclosed by a membrane. Prokaryotic cells are typically simpler and smaller compared to eukaryotic cells, which include organisms like fungi, humans, and plants. Eukaryotic cells possess a defined nucleus and various organelles, which are not present in prokaryotes. This fundamental difference in cellular structure is why bacteria serve as a prime example of prokaryotic organisms.