| A | B |
| migration | The yearly movement of animals to follow food or water. |
| hibernation | The shutting down of body systems and "sleeping" through winter to CONSERVE energy. |
| territorial imperative | The need of animals and plants to defend their territory from others. |
| social hierarchy | Living in a society or group and having different levels of responsibilities and jobs with leaders and followers. |
| competition | Two or more organisms trying to get the same resources at the same time. |
| cooperation | Two or more animals of the SAME species working together so everyone benefits. |
| mutualism | The symbiotic relationship where two or more organisms of DIFFERENT species work together and all are helped. |
| predation | One animals hunting, killing, and eating another animal. |
| commensalism | The symbiotic relationship relationship where one organism is helped but the other organism is not helped or harmed by this relationship. |
| parasite | The organism that feeds off another organism. |
| host | The organism that is harmed when it is feed off of. |
| predator | The animal that hunts, kills, and eats another animal for food. |
| prey | The animal that is hunted, killed, and eaten by another. |
| parasitism | The symbiotic relationship where one organism is helped by harming the other organism. |
| dormancy | The process where plants lose their leaves and "sleep" during the winter to conserve their energy. |
| phototropism | The process where plants grow towards the light in order to get for energy for photosynthesis. |
| symbiosis | The close relationship between 2 different species of organisms where 1 organism lives near, on, or inside the other and at least 1 organism is helped. |