1. Phylum?Chordata 7 Classes: 1. Agnatha Jawless fish 2. Chondrichthyes Sharks, rays

2. 3. Osteichthyes Bony fish 4. Amphibia 5. Reptilia

3. 6. Aves Birds 7. Mammalia Mammals

4. Amphibia

5. What is an amphibian? A vertebrate that with some exceptions, lives in the water as a larva and on land as an adult. Uses gills as a larva, uses lungs as an adult. Lacks scales and claws. Has moist skin with mucous glands.

6. Theory: First amphibians to climb onto land probably resembled lobed-finned fish similar to coelacanth. The transition from water to land involved having legs, lungs to breathe air and protecting eggs from drying out.

7. Characteristics: Feeding: Tadpoles – filter feeders or herbivores Adults – Carnivorous Respiration: Tadpoles – Gas exchange through skin and use of gills. Adults – Lungs Circulation:

8. Excretion: Kidneys filter wastes from blood and form urine to be excreted.

9. Reproduction: External fertilization in most species Read on p 775 to fill in the blanks…

10. Movement: Larvae – wiggling their bodies and using a flattened tail.

11. Adults: Salamanders – walk, run move with S-shaped curves. Frogs and toads – Hind limbs enable them to jump. Tree frogs – have disks on their toes that serve as suction cups for climbing.

12. Response: Hearing: Through tympanic membranes (eardrums)

13. Large eyes that can move around in their sockets. Eye surface is protected by a transparent nictitating membrane. Located inside the regular eyelid. Protect eyes underwater and keep moist on land.

14. http://animal.discovery.com/tv-shows/river-monsters/videos/japanese-giant- salamander.htm http://animal.discovery.com/tv-shows/other/videos/the-vanishing-frog-a-new-species.htm