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象的演化

with the threat of extinction as well. Elephants belong to the Order Proboscidea in the Mammalia class.....more

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such as incisors, canines, premolars and molars. Each type has its own purpose as well, unlike reptiles.....more

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and chewing function. As mammals evolved, the primitive three-cusped molar adapted as well to suit.....more

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teeth. As they age, the teeth become bigger and the number of tooth plates increase in number as well.....more

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of these bears, some researchers have hypothesized that they may also prey on smaller animals as well. " 系統識別碼.....more

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