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STD 11 - 4. Animal kingdom — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 4. Animal kingdom1 Mark
MCQ
Air bladder is
  • ✓
    Hydrostatic organ of bony fishes
  • B
    Excretory organs of mammals
  • C
    Respiratory organs of birds
  • D
    Respiratory organ of reptiles
✓

Answer

Correct option: A.
Hydrostatic organ of bony fishes
a
Air bladder or swim bladder regulates buoyancy. Air bladder is absent in cartilaginous fishes (chondrichthyes) so those fishes have to swim continuously to avoid sinking. Air bladder is present in bony fishes.

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