[Campbell Biology P.777] Which of the following best describes the primary function of the o... | Practice Question

Which of the following best describes the primary function of the operculum in ray-finned fishes?

  • A: To protect the gills and facilitate water movement over them for respiration.
  • B: To help in maintaining buoyancy in the water column.
  • C: To detect vibrations and pressure changes in the water.
  • D: To provide a surface for external fertilization during reproduction.

Explanation

The text states that fish breathe by drawing water over gills located in chambers covered by a protective bony flap called the operculum, indicating its role in both protection and facilitating respiration.