Plants and Animals

How are marsupials different from placental mammals?

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They are generally distinguished from placental mammals by the absence of a placenta connecting the embryo with its mother, although in a few forms the female has a rudimentary placenta that functions for a short time… In nearly all marsupials the female's nipples are covered by a pouch, or marsupium, formed by a fold of abdominal skin.. In addition to having a less efficient reproductive system than the placental mammals, marsupials are of generally lower intelligence.

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