Life 103 Lab week 7 class notes
Life 103 Lab week 7 class notes LIFE 103
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This 2 page Class Notes was uploaded by Devrrae Russell on Friday October 7, 2016. The Class Notes belongs to LIFE 103 at Colorado State University taught by Donna Weedman in Fall 2016. Since its upload, it has received 3 views. For similar materials see Biology of Organisms Lab in Biology at Colorado State University.
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Date Created: 10/07/16
Phylum chordata 4 characteristics - not always present in every form ● Notochord ○ May become vertebral column in some animals ● Dorsal hollow nerve cord ○ Becomes spinal cord ● Pharyngeal gill slits ● Postanal tail Subphylum Urochordata 1. Tunicates - sea squirts i. Invertebrates ii. Filter feeders iii. Adults only exhibit one of the 4 characteristics 1. Pharyngeal gill slits subphylum cephalochordata 1. Lancelets a. Invertebrates b. Filter feeders c. All 4 characteristics in adult form Subphylum vertebrata 1. Class myxini a. Hagfish i. No vertebral column 2. Class petromyzontida a. Lampreys i. Parasitic 3. Class Chondrichthyes a. Cartilaginous fish i. Sharks ii. Rays iii. Skate 1. Skeleton is made of cartilage with bony jaw 4. Class Actinopterygii a. Ray finned fish i. Bony veins used for fin structure 5. Class Sarcopterygii a. Lobed finned fish -bone nubs i. Lungfish ii. celocant 6. Class amphibia a. Frogs b. Toads c. Salamanders i. Ectotherms ii. Tetrapods - 4 legs/feet iii. Eggs in water (non-amniotic) 7. Class reptilia a. Lizards b. Snakes c. Turtle d. Crocodiles e. Alligator i. Ectotherms ii. Amniotic iii. Tetrapods - 4 legs 8. Class aves a. Birds i. Amniotic ii. Tetrapods iii. Spongy bones iv. Feathers v. Endoderms 9. Class mammalia a. Mammals i. Hair ii. Mammary glands for lactation iii. Endotherms
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