| A | B |
|---|
| Adaptation | any structure or behavior that helps a living thing meet its need for survival |
| Camouflage | any coloring, shape, or pattern that allows a living thing to blend into its surroundings |
| Endangered | having a population that is falling low in number and that is in danger of becoming extinct |
| Extinct | no longer existing |
| Fossil | any mark or remains of a plant or animal that lived a long time ago |
| Hibernation | a long, deep sleep in which an animal's heart rate and breathing are much slower than normal |
| Host | a plant or animal that is harmed by a parasite |
| Migration | the movement of an animal from one location to another as the seasons change |
| Parasite | a plant or animal that feeds off another living thing and harms it |
| Pollution | anything harmful added to the air, land, or water |
| Recycle | to use the same materials over and over again |
| Symbiosis | a special way in which two different kinds of living things live together |
