Biology Final Study

Biology Final Study - I II III IV V VI VII VIII IX...

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I. Chordates a. Body Plan i. Dorsal hollow nerve ii. Notochord 1. consists of a fibrous sheath and elastic sheath iii. Pharyngeal slits iv. Post-anal tail v. Heart, aortic arches, dorsal aorta vi. Segmented body organization vii. Increased cephalization viii. Increased activity levels ix. Increased tendency toward predatory life-style b. Urochordata: tunicates i. Show chordate characters in the larva c. Cephalochordata: lancelets d. Vertebrata i. Hagfishes 1. scavengers 2. no bone, now jaws ii. Lamprey 1. no bone, no jaws II. Hemichordate a. Body Plan i. Pharyngeal slits III. Lampreys a. 2 or 3 semicircular canals present in Lamprey and up b. Lack jaws IV. Cartilaginous fishes a. Jaws present in these and up b. Sharks, rays, and skates V. Ray-finned fishes a. Lung or swim bladder present in these and up b. Monphyletic c. Sexual reproduction d. Lung/airbladder, fins, scales, complex skull e. Suction feeding VI. Coelacanth a. Unique fin skeleton VII. Lunfgish a. Unique skull bone pattern b. Sister group to tetrapods VIII. Tetetrapoda a. Limbs with single proximal and 2 distal bones IX. Amphibians a. Body plan/features i. Quadrapedal
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ii. Breath through skin iii. Carnivores iv. Eggs developed in moist condition v. Short limbs vi. Biphasic: aquatic larval phase and terrestrial adult phase, some are all aquatic or all terrestrial vii. Porous skin viii. Cold blooded ix. Store water in urinary bladder, avoid dry situations
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Biology Final Study - I II III IV V VI VII VIII IX...

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