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Unformatted text preview: -Sabertooth (2-3 different lineages in true cat family; nimravid closely related; masrsupials even had sabertooth)-Moles (burrowers)-Gliders (rodent, squirrel, lemur)-Lion and marsupial lions-Tasmanian wolf (and dog very similar, marsupial vs. placential: 4 incisors in tas wolf to 3 in dog, 3 molars in dogs; marsupials have palatal vacuities; carnivorans have carnassials) Was horse evolution directional? Todays horses have hypsodonty teeth. Enamel goes deep into the bone; the enamel gives rise to ridges that help grind down grasses and can last longer. Toes started from 5, went to 1 (a hoof). The first horse was tiny, evolved into much bigger. (5-toed small with simple teeth 1-toed large with complicated teeth). Overall, horse evolution is RANDOM evolution....
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- Spring '08