Which of the following best describes an example of a prokaryotic organism?

Prokaryotic organisms are characterized by their simple cellular structure, which lacks a nucleus and membrane-bound organelles. Bacteria, which belong to the prokaryotic domain, exemplify this because they have a single circular chromosome and ribosomes that are not attached to any membranes. They reproduce asexually through binary fission and can thrive in various environments, often with unique metabolic pathways that allow them to survive in extreme conditions.

Other options are eukaryotic organisms. Fungi, plants, and animal cells all possess a defined nucleus and complex structures, including various organelles, which distinguishes them fundamentally from prokaryotes like bacteria. Therefore, bacteria stand out as the clear example of a prokaryotic organism in this context.