Final answer:
The basal body is associated with flagella, aiding in their movement and providing structural support.
Step-by-step explanation:
The basal body is a structure associated with flagella. Basal bodies function as the organizing center for the microtubules in flagella and cilia and are embedded in the plasma membrane, acting as the motor. They are structurally similar to centrioles and the axonemes of a cilium or flagellum display a '9+2' microtubule arrangement, indicating nine outer doublet microtubules surrounding two central microtubules.
In bacterial cells, the basal body is also responsible for the rotation of the flagellar filament, which is used by the cell for movement.