During the evolution of mammals from reptiles, posterior jaw bones were lost. Where did some of these end up? Group of answer choices middle ear facial skeleton completely lost tongue skeleton
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Step 1: Understand the context of the question, which involves the evolutionary transition from reptiles to mammals and the changes in jaw structure. Show more…
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Gnathostome jaw evolution The hinged jaw seen in the gnathostome vertebrates developed from the __________ that help support the __________ tissues. Multiple Choice inner ear bones; auditory nerve pharyngeal arches; respiratory vertebral column; central nervous occipital lobes; brain
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Reptile squamosal quadrate inner ear articular eardrum stapes dentary Studies of developing embryos show that in a mammal, two bones in the skull become the malleus and incus, which are bones of the inner ear. Observing these same two bones in the development of a reptile embryo, the bones become parts of the jaw. This evidence supports which of the following? The mammal ear bones and reptile jaw bones are homologous structures. During evolution, a structure can change to take on a different function. Living mammals and living reptiles share a common ancestor. All of the above.
Mammals have a particularly good sense of hearing thanks to their inner ear, which includes three tiny bones. In contrast, reptiles have a single inner ear bone. The lower jaw of reptiles is composed of multiple bones, while the lower jaw of mammals is a single bone. Fossil and developmental evidence indicate that the inner ear bones of mammals evolved from lower jawbones. This suggests that the inner ear bones of mammals are
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