| A | B |
|---|
| Sharks, skates and rays have skeletons made of this | cartilage |
| Reptiles have _____ fertilization of their eggs | Internal |
| The fishes have a heart that has ___ chambers | two |
| Vertebrates that have a body temperature similar to the environment | coldblooded |
| Phylum of all Vertebrates | Chordata (chordates) |
| These live part of their lives in water and part on land | Amphibians |
| the process by which fish lay and fertilize eggs | spawning |
| Adult amphibians have a ___ chambered heart | three |
| Vertebrates that produce their own heat | warmblooded |
| These have scaly skin, breathe with lungs, and live mainly on land | reptiles |
| During this, the gills of a tadpole are replaced with lungs | metamorphosis |
| Lampreys are ____ fish that attach themselves to the bodies of other fish | jawless |
| The developing young of reptiles are protected from drying out because they are covered by a _____ | shell |
| Amphibians have _____ fertilization of their eggs | external |
| An internal ____ is a characteristic shared by all vertebrates | skeleton |
| A frog uses this to hear | tympanic membrane |
| A male frog uses these to make his croak louder | vocal sac or pouch |
| The largest type of frog | goliath frog |
| Bumps on a toad are actually these | poison glands |
| To swallow, a frog has to do this | close his eyes |
