BIOL 1102 Lecture Notes - Lecture 30: Microbat, Megabat, Bat

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5:23 pm: mammals evolved from primitive reptiles called therapsids about 250 million years ago. Central, and south america (opossums: unique features. In many species, young complete development in a pouch (marsupium: different sized nipples as offspring grow, placental (eutherian): includes most living species of mammal. There are two main groups: two groups, megachiroptera. Most eat fruit or nectar: microchiroptera, small, mostly nocturnal. Efficient system: hindgut fermentation, horses, elephants, koala, humans, rabbits. Fermentation chamber (caecum or appendix) is found after small intestine absorbs nutrients. Not efficient: coprophagy: send food through digestive system twice, why, get more nutrients the second time around, carnivora, carnivores. Dogs, cats, weasels, bears, seals, racoons, pandas, etc. Is a hyena more like a cat or a dog: cat. Large brains and short jaws: two groups of primates, prosimians. Lack prehensile tails and their nostrils open downwards: great apes.

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