Answer:
The flagellum
Explanation:
A flagellum is a whip-like structure that allows a cell to move (swim).
Prokaryotic cells move through liquids or over moist surfaces by swimming, swarming, gliding, twitching or floating. An impressive diversity of motility mechanisms has evolved in prokaryotes. Movement can involve surface appendages, such as flagella that spin.
The capsule is sticky and helps the cell attach to surface in it's environment. Some bacteria also have specialized structures found on the cell surface,which may help them move,stick to surfaces,even exchange genetic material with other bacteria. Flagella and some pilli are used for locomotion ,fimbriae help the cell stick to a surface and sex pili are used for DNA exchange. Most prokrayoyic cells have circular chromosomes
