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History of Life0 - History of Life Recapitulation of C eno...

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12/19/11 History of Life 1/2 www2.fiu.edu/alongoria/gly1101/recap-cz.html Recapitulation of Ceno]oic Events Paleocene : Radiation of Mammals, birds, and insects. Topical conditions Eocene : Radiation of flowering plants, most modern mammalian orders are represented. Oligocene : Monkeys appeared, mild climates Miocene : Apes arise, climate cooler, plains and grasslands Pliocene : Hominids appear, large carnivores. Pleistocene : Ice ages, modern humans (Genus HRmR ) appear Holocene (Recent): Human civilization >The marine invertebrate groups that survived the Mesozoic extinctions diversified throughout the Cenozoic. Bivalves, gastropods, corals, and several kinds of phytoplankton such as foraminifera proliferated. >During much of the Early Cenozoic, North America was covered by subtropical and tropical forests, but the climate became drier by Oligocene and Miocene time, especially in the mid-continent region. >Birds belonging to the living orders and families evolved during the Paleogene System. Large, flightless predatory birds of the Paleogene were eventually replaced by mammalian predators. >Evolutionary history is better known for mammals than for other classes of vertebrates, because mammals have a good fossil record and their teeth are so distinctive. >Egg-laying mammals (monotremes) and marsupials exist mostly in the Australian region. The placental mammals¤ by far the most common mammals owe their success to their method of reproduction.
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