It not only gives us authority but the responsibility to take care of it since we are able to do so 18 Review1.What four characteristic physical features distinguish chordates from other animals?Nerve cord, notochord, pharyngeal pouches, post-anal tail2.Which class of fish is not really a vertebrate? Explain.Jawless fish, they dont even have vertebrae3.+20
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Elijah Hamilton18C, ReviewHonor IntegrityDiscipline ExcellenceCartilaginous fishBony fishHas jaws and many use their jaws to capture food Have jaws, also have a second set of jaws called pharyngeal jaws to chewHas gills but no operculumHas gills and an operculum to cover themSkeleton made completely out of cartilageBony skeletonFins are covered in the same skin as the rest of their bodyHave membranous fins or lobe finsUse their large livers to maintain buoyancyUse a swimbladder to maintain buoyancy4.Identify each fish as jawless, bony, or cartiliginous.a.Bonyb.Cartilaginousc.Jawless5.Explain the difference between the gill structures of bony fishes and cartilaginous fishes.Bony fish have a structure called an operculum which covers their gills, bony fish can also pumpwater over its gills by opening its operculum; cartilaginous fish lack operculum and must keep swimming so water keeps filtering through their gills6.What is the function of the lateral line?It senses vibrations in the water 7.What type of reproduction and fertilization would a fish that produces a mermaid’s purse exhibit?Oviparous internal fertilization8.How might shark fins be collected for shark fin soup in a responsible manner?
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