Identify a structure that plays a role in motility.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Flagella.
Flagella are long, whip-like structures that protrude from the cell body and are primarily responsible for motility in many bacteria and some eukaryotic cells. They rotate or undulate to propel the cell through liquid environments, allowing it to move toward nutrients or away from harmful substances. In contrast, villi are finger-like projections in the intestine that aid in absorption, not movement. Pili and fimbriae are short, hair-like structures that help bacteria attach to surfaces or other cells but do not play a significant role in motility. Therefore, flagella are the structures directly associated with movement.