Chodates/ Brief intro to Human Evolution
Chodates/ Brief intro to Human Evolution BIO 121
Popular in General Biology
Popular in Biology
This 4 page Class Notes was uploaded by Holden Hershey on Friday November 14, 2014. The Class Notes belongs to BIO 121 at Syracuse University taught by Wiles in Fall. Since its upload, it has received 138 views. For similar materials see General Biology in Biology at Syracuse University.
Reviews for Chodates/ Brief intro to Human Evolution
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 11/14/14
Brief Overview of Chordates Also Intro to Human Evolution Copyright 5 The MccrawHIII Companies Inc Petmlssoon required tor reproduction or cheptay Aves birdsgt gtgt Reptilia reptiles V feathers mmary glands hair E113 ma Phylogenetic tree of the chordates ll jjhmulalia mammals v 7 7f13fl hyes bony shes Ancestral chordates Chordates de ned by the presence of a Notochord and a dorsal hollow nerve cord Include VertebratesGnathostomes Osteichthyans Lobefins Tetrapods Amniotes All of the following organisms are chordates Cephalochordata Lanceletsj Basal Chordates Marine Suspension feeders that exhibit four key characters of Chordates Notochord Hollow Nerve chord Pharyngeal Slits Postanal tail Urochordata Tunicates Marine Suspension feeders Larvae display derived traits of chordates Mvxini Hagfishes jawless Marine Vertebrates Have head that includes a skull brain and eyes Along w other sensory organs Vertebrates All of the following organisms are vertebrates Hox Genes DupIication Backbone composed of Vertebrae Petromvzontida Lampreysj jawless aquatic vertebrates with reduced vertebrae Typicalb feed by attaching to a live sh and ingesting its blood Gnathostomes All of the following organisms are Gnathostomes Hingedaws Four sets of Hox Genes Chondrichthves Sharks Rays Skates Ratfishes Aquatic Gnathostomes Have skeletons made of cartilage Derived traits from the reduction of ancestral mineralized skeleton 0steichthvans All of the following organisms are 0steichthyans Bony Skeleton Actinopterygii Rayfinned Fishes Aquatic Gnathostomes Bony skeletons Maneuverable ns supported by rays Lobe Fins All of the following organisms have lobed fins Muscular ns or limbs Actinistia Coelacanths Ancient lineage of aquatic lobe ns Live in the Indian Ocean Dipnoi Lungfishes Freshwater lobefins Have lungs AND Gills Sister group of tetrapods Tetrapods All of the following organisms are Tetrapods Four Iimbs Neck Fused Pelvic Girdle Amphibia Salamanders Frogs Caecilians Four limbs Descended from modified ns Most have a moist skin that functions in gas exchange May live both in water as larvae and on land as adults Amniotes All of the following organisms are Amniotes Lay quotamniotic eggsquot Use their rib cage for ventilation Reptilia Tuataras Lizards Snakes Turtles Crocodilians Birds One of two living groups ofAmniotes Have amniotic eggs Rib cage ventilation Key adaptations for life on land Mammalia Monotremes Marsupials Eutherians Evolved from synapsid ancestors Include egg laying Monotremes echidnas platypus Include PouchedMarsupials Kangaroos 0possums Include Eutherians Placental MammalsRodents Primates Humans are mammals that have large brains and use Bipedal Locomotion Reference Evolutionary Lineage Image Attached Below Derived characteristics of Humans Bipedalism Larger Brain Reduced jaw size compared to other apes Hominins Humans and species that are more closely related to humans than to chimpanzees Originated in Africa about 6 million years ago As Hominins developed Brain size increased Early Hominins had small brains but probably walked upright Oldest evidence of tool use is 25 million years old Neanderthals lived in Europe and the Near East from about 350000 to 28000 years ago Homo Ergaster first fulbl bipedal large brained hominin Homo Erectus First hominin to leave Africa Homo Sapiens originated in Africa about 1 95000 years ago and began to spread to other continents about 1 15000 years ago MR K Common Ape Homo Neanderthal Cro Magnon Homo Homo Ancestor erectus sapiens sapiens hom1onusquot Works Images Cited quotPhy1ogenetic Tree of Chordatesquot Phylogenetic Tree of Chordates Np nd Web 13 Nov 2014 quotRosa Rubicondiorquot Nebraska Man Np nd Web 13 Nov 2014