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Question
multiple select question
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select the two classes of bony fishes.
jawless
lobe - finned
paired - finned
cartilaginous
ray - finned
Bony fishes, or Osteichthyes, are divided into two main classes. Lobe - finned (Sarcopterygii) have fleshy, lobed fins with a single bone structure. Ray - finned (Actinopterygii) have fins supported by ray - like spines. Jawless (Agnatha) are a separate superclass. Paired - finned is a general characteristic not a class. Cartilaginous (Chondrichthyes) are a different class (sharks, rays) with cartilage skeletons.
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lobe - finned, ray - finned