PALec7 - Time, Geology, and the Fossil Record Lecture 7 The...

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Time, Geology, and the Fossil Record Lecture 7
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The Big Timeline Part 1
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Timeline 15 billion years ago--Universe comes into existence 4.6 billion years ago --Our solar system assumed its present form. 3.5 billion years ago --the first life forms (simple prokaryotes) appear on earth.
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Timeline 2 1.4 billion years ago--Eukaryote cells appear. 800 million years ago--The first multicellular life forms are found. 800-600 million years ago--Primitive plants emerge; jellyfish and worms are the only types of multicellular animal life forms.
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Kelp Forest
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“Seaweed” (Ireland)
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Lion’s Mane Jellyfish
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Beached Blue Bottle Jellyfish
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Ocean Worm
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Timeline 3 600 million years ago--Animals with “hard parts” emerge. 600-550 million years ago--The phylum “chordata” emerges. (Central nerve cord and gills) 450 million years ago--Plant life begins to adapt to on to life on land.
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Trilobite
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Timeline 4 370 million years ago animals begin adapting to life on land. 300 million years ago reptiles develop 220 million years ago mammals develop 100 million years ago placental mammals emerge 70-62 million years ago primates emerge
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Timeline 5 65 million years ago--dinosaurs die out 30 million years ago--superfamily Hominoidea appears (tailess primates--apes) 17 million years ago--subfamily “Ponginea” emerges (ancestors of modern “great apes”) 5 million years ago--Hominids (upright walking primates) appear
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Australopithecines
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Timeline 6 2 million years ago--the genus hominid emerges Homo habilis-- “able” or “handy man” ). 1.6 million years ago-- Homo erectus appears (may have been first hominid to leave Africa; may have been the first species to use fire) 300,000-150,00 years ago--Neanderthals appear. 200,000-100,000 years ago-- Homo sapiens appear
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Homo habilis?
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Homo habilis?
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Homo Erectus Regions
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Homo Erectus?
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Homo Erectus?
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Homo Erectus?
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Homo Erectus
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Neanderthals?
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Neanderthals?
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Neanderthal?
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Neanderthal?
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Geico Neanderthal
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Timeline 7 27,000 years ago--Neanderthals die out, perhaps leaving Homo sapiens as the only surviving hominids.
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The Fossil Record Part 2
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This note was uploaded on 02/13/2012 for the course ANTH 2 taught by Professor A during the Spring '08 term at Irvine Valley College.

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PALec7 - Time, Geology, and the Fossil Record Lecture 7 The...

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