Final answer:
A centriole contains 9 complete microtubules, and a cilium contains 20 complete microtubules. Centrioles are involved in cell division, and cilia in movement and sensory functions.
Step-by-step explanation:
A centriole contains 9 complete microtubules (in the form of nine triplets), and a cilium contains 20 complete microtubules (arranged as 9 doublets around 2 singlets in the center).
Centrioles are cylindrical structures that play a crucial role in cell division, and each one is composed of nine triplets of microtubules held together by accessory proteins. Cilia, on the other hand, are hair-like structures on the cell surface involved in movement and sensory functions. They have a 9+2 arrangement of microtubules with nine doublets surrounding two central singlets.