Final answer:
Cilia and flagella emerge from a basal body in eukaryotic cells.
Step-by-step explanation:
In eukaryotic cells, both cilia and flagella emerge from a basal body. The basal body is a structure found at the base of each cilium or flagellum, and it is composed of an array of triplet microtubules similar to that of a centriole. The basal body attaches the cilium or flagellum to the cell and is embedded in the plasma membrane.