| A | B |
| structural adaptation | body part that helps an animal survive |
| incisors | sharp front teeth used by meat-eating animals to tear off chunks of flesh |
| molars | the flat teeth found along the sides of the mouth; such teeth are large in grazing animals |
| canines | sharp pointed teeth found near the front of the mouth. Teeth are large in meat-eating animals |
| protective coloration | when an animal has a color similar to the color in its environment |
| mimicry | when an animal looks like a dangerous or poisonous animal |
| behavior | activities and actions of an animal |
| instinct | any behavioral pattern that an animal is born with |
| migration | movement of an animal or group of animals over a long distance |
| breeding grounds | regions where animals move to reproduce and care for young |
| hibernation | very deep sleep in which an animal spends the winter |
| cold-blooded animal | an animal whose body temperature changes as the temperature of the environment changes (amphibians and reptiles) |
| protective resemblance | when animals look similar to something in its environment |
| warm-blooded animal | an animal that has a fairly constant body temperature (birds and mammals) |
| learning | a process that results in a change in behavior due to experience. (practice and reinforcement) |
| imprinting | learning that occurs when newly-hatched birds identify the first moving thing they see as being their mother |