Prokaryotic flagella are long, whip-like structures that enable movement in prokaryotic cells, such as bacteria. Unlike eukaryotic flagella, which have a complex structure, prokaryotic flagella are simpler and consist of a protein called flagellin. They are anchored in the cell membrane and rotate like a propeller, allowing the cell to swim through liquids. The arrangement of prokaryotic flagella can vary; they may be located at one or both ends of the cell or distributed all over the surface. This versatility helps bacteria adapt to different environments and enhances their ability to find nutrients or escape harmful conditions.