lecture1 - Chapter 34 Vertebrates Biol 201B Part 3...

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1 Biol 201B Part 3: Vertebrates Annalisa Berta LS 250 Office Hours: MW 10:00-11:00am [email protected] Chapter 34: Vertebrates • Review folders: Powerpoint lectures, iQuizzes, cladograms and study questions (Blackboard) • Reading: Campbell Biology 7th ed. • Quiz in class April 28 (10 pts.) Chapter 34: Vertebrates characteristics of vertebrates Reading: Chapter 34: 671-678 Chapter 34: Vertebrates Chordata - 3 major groups: 1. Urochordata (tunicates) 2. Cephalochordata (lancelets) 3. Craniata (hagfish + Vertebrata) Chordates: Defined ( Apomorphies ) 4 characters Craniata: Defined Vertebrata: Defined Chapter 34: Vertebrates Chordata • includes Craniata (hagfish, fishes, amphibians, reptiles, mammals) + Urochordata (tunicates) + Cephalochordata (lancelets) • only Craniata is diverse but others provide info on how Craniata originated and character evolution Chapter 34: Vertebrates Chordates chordates are Bilaterian animals and belong to the clade Deuterostomia
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2 Chapter 34: Vertebrates 4 Chordate Characters: 1) Pharyngeal gill slits: open to outside of body Character evolution lophophore-- proboscis-- pharyngeal gill slits--gills Functional changes: Feeding--respiration in aquatic verts & in terr. verts Fig. 34.3 Muscle segments Brain Mouth Anus Dorsal, hollow nerve cord Notochord Muscular, post-anal tail Pharyngeal slits or clefts Chapter 34: Vertebrates Chordate Characters: 2) Notochord - name bearer of
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lecture1 - Chapter 34 Vertebrates Biol 201B Part 3...

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