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Chp 18

Terms in this set (16)

What is the dominant land plant?
Angiosperms
What is left after the extincition?
1. Only cephalopods left...modern nautilus and shell-less cephalopods like squid and octopi
Three groups of mammals
monotremes, marsupials, placental
Monotremes
Egg laying mammals
Marsupials
pouched mammals
Placental
Mammal type that fully develops in uterus with umbilical cord
North American mammals include
camels, rhinos, horses, bovides
Did horses go extinct in America?
Yes at the end of the ice age
Example of an Early horse
Mercyhippus
Merychippus
An ancestor of the horse, characterized by its larger size, teeth for grazing, and hooves with two vestigial toes.
Example of extinct carnivore mammals
1. Smilodon the Sabre Toothed Cat and Dire Wolves
Cenozoic mega fauna
Mammoths, Mastodons, Elephants, Giant Ground Sloths
Why are whales interesting?
They are mammals that breath air have hair give birth and feed young milk
Where can Cenozoic fossils be found?
Florida, and the La Brea Tar Pits
Who went extinct 14.500-10,000 years ago?
1. Mammoths, Mastodons, Dire Wolves, Giant Ground Sloths, Smilodon,...extinct in North America...horses, camels, rhinos, hippos
Overkill hypothesis
argues that humans were responsible for the Late Pleistocene extinction of megafauna in northern Eurasia and North and South America
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