Question

the cilia and flagella of eukaryotic cells are composed of _______.
intermediate filaments
microtubules
microfilaments
tonofilaments
pili

Explanation:

Cilia and flagella in eukaryotic cells are made of microtubules arranged in a '9 + 2' pattern. Microtubules are part of the cell's cytoskeleton and provide structural support and motility. Intermediate filaments, microfilaments, tonofilaments, and pili have different structures and functions and are not components of cilia and flagella in eukaryotes.

Answer:

B. microtubules