The ray-finned fishes are the most numerous and advanced bony fishes.
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Q10: Hagfishes locate their food through keen vision.
Q11: The cartilaginous fishes are believed to have
Q12: The hagfishes are marine scavengers.
Q13: The chondrosteans are one group of the
Q14: All bony fishes have a pneumatic duct
Q16: The earliest fishlike vertebrates were a paraphyletic
Q17: The ampullary organs of Lorenzini are receptors
Q18: Despite its name,the ectoparasitic marine lamprey Petromyzon
Q19: All lampreys are parasitic on other fish.
Q20: In North America,both marine and freshwater lampreys
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