Question

which of the following statements about bacterial motility is correct? flagella are the most common structures enabling movement in bacteria. bacterial flagella are identical in structure and function to eukaryotic flagella. taxis refers to random movement without a specific direction. chemotaxis is movement toward or away from light.

Explanation:

• Flagella are the primary, most common structure for bacterial movement. Bacterial flagella have a distinct structure (a basal body, hook, and filament) different from eukaryotic flagella. Taxis is directed movement, not random. Chemotaxis is movement in response to chemical signals, not light (phototaxis is light-related movement).

Answer:

Flagella are the most common structures enabling movement in bacteria.