Motile spores; motile robots.
Polarity is clearly seen in Vibrio cholerae, a highly motile pathogen that swims by rapidly rotating a single polar flagellum.
The phylum Chytridiomycota has traditionally been characterized on the basis of motile cells with a single posterior flagellum.
This can occur in breast cancer cells and results in cells becoming motile.
Some are actively motile, some are free-floating whilst many are found attached to a substrate.