2 An animal with a backbone is called a vertebrate. A bird is a vertebrate.A human is a vertebrate.
3 Vertebrates are classified by how they control their body temperature. Cold blooded vertebrates (fish, amphibians, and reptiles) get heat from outside the body.Warm blooded vertebrates (birds and mammals) use energy from food to keep body temperature constant.
4 An animal without a backbone is called an invertebrate. A worm is an invertebrate.An octopus is an invertebrate.
5 Cnidarians are invertebrates that have poison stingers on tentacles. Three types of cnidarians areHydraJellyfishSea anemones
6 Mollusks are soft bodied invertebrates. Examples of mollusks areSnailsClamsOysterssquids
7 Echinoderms are spiny skinned invertebrates. Echinoderms are identified byA star designSpiny skinAn internal supporting structure called an endoskeleton.
8 Arthropods make up the largest invertebrate group. Arthropods are identified by a hard skeleton on the outside of their bodies called an exoskeleton.Examples areArachnidsCentipedes and millipedesCrustaceansInsects