CK-12 Foundation
Ck 12: Biology: Vertebrate Characteristics
[Free Registration/Login may be required to access all resource tools.] An overview of characteristics and traits of vertebrates.
CK-12 Foundation
Ck 12: Life Science: Vertebrate Characteristics
[Free Registration/Login may be required to access all resource tools.] Vertebrates are animals with backbones. These include fish, amphibians, reptiles, birds, and mammals. Learn more about vertebrate characteristics in this learning...