Sept30LecNotes - September 30th Lecture Notes Transcribed...

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September 30 th Lecture Notes Transcribed notes taken by Dr Balko (5 min video) featuring tetrapod ectothermy ~ taken from 5 episodes of (ppt) Routine Class Matters ~ Reading assignments for Today: chp 18 (pp 384-394) ~ finish biodiversity portion of course. For Thursday READ Chp 8 nto essay through 8. And 8.11- 8.18 (only these sections) Prelim I results will be posted on BLACKBOARD later this week [thank you for your patience ~ we have over 800 essays to grade ] After fall break we’ll tackle evolution ~ make note of days off around fall break (ppt) Re-visiting fruit examples that Harry brought back from VA o Squirrels are main dispersers Spines on husk of chestnut are there to defend the seeds w/in interior nut while they’re in trees (ppt) Prelim 1 comments… We’ll post the grades by the end of the week, on Blackboard by CUID o Too easy? Don’t be lulled!! Too hard? Don’t give up!! Use the Learning Center… Ask, why did I lose points? Talks to us! You can improve! (ppt) Overview of Phylogenetic classification of Vertebrates Vertebrata Lampreys Jawed Vertebrates Chondrichthyes (sharks and rays) Osteichthyes (bony fishes) Ray-finned Fishes (24,000 species) Fleshy-finned Fishes Coelacanths (2 species) Internal Nostrils Lungfishes (5 species) Tetrapoda (26,000 species) (ppt) Lobed-fin fishes [muscular fins supported by bones) 1
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September 30 th Lecture Notes Transcribed notes taken by Dr Balko Coelacanth “living fossil” (ppt) Air-breathing relatives of early lungfishes developed skeleton-reinforced appendages and gave rise to the first tetrapods (“four legs”) (ppt) Phylogenetic classification of tetrapods ~ Tetrapoda (four limbs) Amphibia (frogs, salamanders, caecilians) Amniota (lay shelled eggs) Mammalia (hair) Reptilia (scaly skin, many lay eggs) Chelonia (turtles) Lepidosauria (lizards and snakes) Archosauria (dinosaurs etc.) Crocodylia (crocs) Aves (birds) ( ppt) Amphibians (Figure 18.18 B-D) - frogs, toads, and treefrogs, salamanders, and caecilians Are evolutionarily derived from early tetrapods Most amphibian embryos and larvae still must develop in water
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This note was uploaded on 10/21/2009 for the course BIO G 109 at Cornell University (Engineering School).

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Sept30LecNotes - September 30th Lecture Notes Transcribed...

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