Short hair-like structures that protrude from the plasma membrane of some eukaryotic cells are called ____.

A) cilia
B) flagella
C) intermediate filaments
D) microfilaments
E) pili

Short hair-like structures that protrude from the plasma membrane of some eukaryotic cells are called cilia. Flagella are similar but are longer and usually occur singly or in small numbers. Intermediate filaments and microfilaments are part of the cytoskeleton of cells and are not protrusions from the plasma membrane. Pili are present in some prokaryotic cells and are used for attachment and conjugation.