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Chordates
Animals without a notochord
Notochord
Is a flexible,rod-shaped cartilage found inside the embryo of a chordate
Vertebrates
Group of animals with a backbone
Examples of vertebrates
Fishes amphibians reptiles birds and mammals
Cold blooded animals
Group of animals that cannot contain there temparature
Ex:fishes,reptiles
fishes
Have been around for 500 million years,they are aquatic animals with fins and tails they use to swim
Jawless fishes
The oldest group of animals.they do not have scales and jaws.among tge species of jawless fish, only the lamprey and hagfish remain
Bony fishes
Largest group of animals
Amphibians
Are group of animals that can stay both land and water
Note 
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