... larger. There are some 250 kinds of living marsupials. These include the Australian and New Guinean insectivorous and carnivorous (insect and meat-eating) marsupials, the omnivorous (plant and meat-eating) bandicoots, and the herbivorous (plant eating) possums, koalas, wombats and kangaroos as well as the South American opossums. Scientists have grouped them according to differences in their dentition. They are either polyprotodonts ... (with many teeth and always three pairs of incisors on the lower jaw) or diprotodonts (fewer teeth with only one pair of especially well-developed incis...

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• Grade Level: Undergraduate