| A | B |
|---|
| Phylum Chordata | animals having a notocord, dorsal nerve cord, pharyngeal gill slits, and post anal tail at sometime in their life |
| Subphylum Urochordata | the subphylum that contains the sea squirt |
| Subphylum Cephalochordata | the subphylum that includes amphioxus (lancelet) |
| Subphylum Vertebrata | the subphylum that contains animals with vertebrae |
| Class Agnatha | the class that includes the lamprey |
| Class Chondricnthyes | the class that contains animals with skeletons made of cartilag, ex. shark |
| Class Osteichthyes | class that includes the body fish, ex. perch |
| Class Amphibia | class that includes animals that live on land but need water, ex. frog |
| Class Reptilia | class that includes snakes and lizards |
| Class Aves | class that includes the birds |
| Class Mammalia | class that includes dogs, cats, horses, etc. |
| monotremes | mammals that lay eggs |
| marsupials | mammals that have a pouch |
| placentals | mammals that have a placenta |
