vertebrates chordates DICHOTOMOUS keys: walk thru ch12 tolweb TREE first.
pharyngeal slit=gill pouch in ch10 (middle ear); Deuterostomes 2nd opening=mouth: sea urchin.
Dorsal/ventral; hollow CNS filled w cerebral spinal fluid, attach muscles
Lancet, tunicate(sea squirt); lobster ventral SOLID nerve cord; fish CAUDAL fin
PBS-YourInnerFish InnerMonkey 47:25 shark brain 49:00 Amphioxus (Lancet) CHORDATE has nerve genes for brain Chordates: The Notochord and Vertebrate Movement Giant Pyrosome and Salps: sea squirts are chordates without vertebrae
fish Tiktaalik 375 MYA Devonian. Modified vertebrae swimming whale. Fins HOMOLOGOUS with limbs.
Is WHALE a fish? Male sings courtship in tropics - fish don't sing/parental care!
Bring ray-finned FISH skeleton: no arm-like joints. Dolphin Tale: is a dolphin a fish? Whales are mammals 1:40 Humpback calf drinks 500 l of milk per day BBC-PlanetEarth/3_ShallowSeas 1:40 Humpback calf 500 l milk in tropic - 3:50; 44(46 in MP4) poles, 5M shearwaters
Mudskipper can walk on land and breathe air Raising walking fish on land
fins ERRATA lampreys DO have fins.
amniotic PEANUT embryo no yolk. SAY amniotic FLUID. EGG is multicellular! Amphibs are terrestrial vertebrates but not amniotes.
PBS-YourInnerFish InnerReptile 10:00 human fetus yolk sac (no yolk) 13:00 genes; 14:00 skin layers; shed
mammals middle ear Platypus Hunts with "Sixth Sense" - electrolocation Platypus genome 3:00 Pangaea biogeography: marsupials & monotremes; 5:05 nasal receptors Platypus genome: evolution of monotremes 180 MYA Do Dolphins Have Hair Follicles? (SeaWorld)
primates Chimpanzees 5-6 MYA. Spider/capuchin/squirrel=NW monkeys; BABOON Macague are Catarrhini=OW monkeys + apes (GIBBONS are lesser)
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