11.Mark the correct statement: A. Trygon is warm blooded organism B. Air bladder regulates Buoyancy in Fishes C. In Amphibians, Eyes do no have eyelids D. Class Osteichtyes has Placoid Scales
Option B Air bladder regulates buoyancy in fishes. It contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking. It also serves as a resonating chamber to produce or receive sound.
