Several URLanisms, such as bacteria, algae, or spermatozoa, use flagellum or cilium activity to swim in a fluid .
<clarity> Several URLanisms, such as bacteria, algae, or spermatozoa, use flagellum or cilium activity to swim in a fluid .
Several URLanisms, such as bacteria, algae, or spermatozoa, use flagella or cilia to swim in a fluid .