A prokaryotic cell is a simple type of cell that lacks a nucleus and other membrane-bound organelles. These cells are typically smaller than eukaryotic cells and are characterized by their genetic material, which is usually a single circular strand of DNA located in a region called the nucleoid. Prokaryotic cells are primarily found in organisms classified as bacteria and archaea. Prokaryotic cells have a rigid cell wall that provides structure and protection. They reproduce asexually through a process called binary fission, where one cell divides into two identical cells. These cells can be found in various environments, from soil to extreme conditions, showcasing their adaptability and diversity in the microbial world.