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- What is the currently favored explanation for the evolution of vertebrate jaws?Evolutionarily, the jaws of vertebrates developed from the circular mouth of lampreys. the third and fourth gill arches of primitive jawless fishes. the operculum. the claspers. the last gill arch of primitive jawless fishes.What is the select advantage of the evolution of the jaw in dogfish shark?
- We usually think of jaws as structure whose original function was biting. What might have been a different original use of jaws, and what is the evidence for this?Why are paleontologists excited to find teeth in the fossil record? Name three pieces of information paleontologists can learn from fossil teeth.Comparing Australopithecines, early Homo, and late Homo, how did dentition change over time? Highlight at least two general dental trends in your response (e.g. tooth size, robusticity of chewing apparatus, dental arcade shape, etc.).
- Find the hash mark indicating the origin of jaws. Which group or groups of vertebrates possess jaws? Which group(s) diverged before jaws originated? Are birds more closely related to amphibians or to crocodiles? Explain how you know this.How does the alligator snout become elongated relative to the salamander’s? Does it add new bones, or change the shape of pre-existing (in amphibian ancestors) bones?Find the hash mark indicating the origin of jaws. Which groups of vertebratespossess jaws? Which group(s) diverged before jaws originated?
- Compare the types and numbers of primary (deciduous) teeth present in the pig’s maxilla with those of thehuman.What makes the Ardipithecus ramidus is distinct from members of the species Australopithecus afarensis because of its larger molars smaller and less molar-like premolars large canines b and cWhat is meant by a “kinetic” skull and what benefit does it confer? How are snakes able to eat large prey?