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Q.

Compare and contrast cartilaginous and bony fishes.

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Detailed Solution

CharacteristicsCartilaginous fishBony fish
HabitatOnly marine All types of aquatic environment
EndoskeletonCartilaginousBony
OperculumAbsentPresent
Air bladderAbsentPresent
Type of excretionUreotelicAmmonotelic
Respiratory structures 5 to 7 pairs of lamelliform gills4 pairs of filamentous gills
ClaspersCopulatory structures in malesAbsent
Type of reproductionViviparous Oviparous 
ExamplesSharkFlying fish
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