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Kingdom Animalia
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What Is an Animal Multicellular, heterotrophs Ingestion
Unique reproduction and development
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Life history
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When did the First Animals Appear in Fossils?
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Cambrian explosion explosion of diversity Burgess Shale fossil deposit
Why did this explosion occur?
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Animalia Evolution
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Major Adaptations: Tissues
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Animalia: Major Evolutionary Events
Radial and bilateral symmetry
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Sponges
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Cnidarians
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Flatworms
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Roundworms
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Arthropods
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Arachnids
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Crustaceans
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Millipedes & centipedes
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Insects
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Metamorphosis
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Echinoderms
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Vertebrate Evolution and Diversity
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The Chordates What were our ancestors like?
How are we related to other animals? What are our closest relatives?
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The Vertebrate Genealogy
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Tunicates Have all the chordate characteristics in embryonic stage
Adults are sessile, filter feeders How could tunicates be ancestors to vertebrates?
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Paedomorphosis Strikes Again!
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Fishes
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The Move onto Land How did the land vertebrates evolve from fish ancestors? Evidence? Lobe-finned fishes Tadpole larvae of amphibians Lungfishes
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Amphibians
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Reptiles
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Birds
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The Primates 65 mya; arboreal Brachiate & dextrous hands Eyes & vision
Parental care
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Primate Phylogeny
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Misconceptions We did not evolve from chimpanzees or apes
We had a common ancestor The “hominid parade” Does evolution have a goal? Human features evolved at same rate Upright ancestry were dumb critters
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No Parade After All
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The Human Evolution Australopithecus sp. “Lucy”, 3.24 mya
4 mya fossils First bipedal Hunter-gatherers Extinct 1.4 mya
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The Human Evolution Homo habilis 2.4 mya; E Africa Enlarged brain
Oldawon flakes Extinct 0.75 mya Australopithecus?
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The Human Evolution Homo erectus 1.8 mya Expanded territory; diet?
Peking & Java Man Bigger brain; Acheulean tools Weapons; cave-dwelling < Sexual dimorphism Extinct 200,000 ya
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The Human Evolution H. neanderthals 350,000 – 28,000 ya
Europe & W Asia H. erectus descendants? Large brains Skilled toolmakers Rituals, burials, social Out competed? Interbred?
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The Human Evolution Homo sapiens 195,000 ya Cro-Magnons
Complex weapons & tools (bone; ivory; wood) Descendents of H. erectus? Where did we come from?
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Origin of Modern Humans
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