| A | B |
|---|
| homeostasis | keeping internal conditions stable |
| functions of animals | get food, oxygen, homeostasis and reproduciton |
| notochord | at some point all chordates have this flexible rod |
| radial symmetry | sea anemone |
| invertebrate | no backbone; usally has exoskeleton |
| symmetry | balanced display of body parts |
| Monotreme | mammal that lays eggs |
| spinal cord | is protected by the backbone |
| backbone | most Chordates have this structure |
| bilateral symmetry | one line can be drawn to divide |
| endotherm | body temperature does not change much |
| multicellular | all animals |
| marsupial | mammal that allows young to develop in pouch |
| ectotherm | does not produce much internal heat |
| mammals and fish | vertebrate that are endotherms |
| vertebrate | animal with backbone |
