| A | B |
|---|
| Amphibian | "double life" |
| Metamorphosis | developmental process |
| Circulation | completed by a 3-chambered heart |
| Respiration | oxygen and carbon dixoide exchanged through skin |
| Reproduction | depend on water for this |
| Frogs, Toads, Salamanders | examples of amphibians |
| Hibernation | inactivity during the cold months |
| Estivation | inactivity during the hot months |
| Biological Indicator | organism's health reflects that of the ecosystem |
| Toxins | poison secreted by frogs to kill large animals |
