| A | B |
|---|
| Symbioses | Close interactions among species. |
| Predator | The individual that captures, kills, and consumes another individual. |
| Prey | The individual that is captured, killed, and consumed. |
| Mimicry | Whena harmless species resembles a poisonous or distasteful species. |
| Herbivores | Animals that eat plants. |
| Secondary compounds | Poisonous, irritating, or bad-tasting chemicals that are made by plants to avoid being eaten. |
| Parasitism | A species interaction that resembles predation in that one individual, the parasite, feeds on another individual, the host. |
| Ectoparasites | External parasites. |
| Endoparasites | Internal parasites. |
| Competition | The use of the same limited resource by two or more species. |
| Competitive exclusion | When one species is eliminated from a community because of competition for the same limited resource. |
| Character displacement | When competitors evolve niche differences or anatomical differences that lessen the intensity of competition. |
| Resource partitioning | When similar species coexist, each species uses only a part of the available resources. |
| Mutualism | A cooperative relationship in which both species derive some benefit. |
| Pollinators | Animals that carry pollen. |
| Commensalism | An interaction in which one species benefits and the other is not affected. |
| Succession | The gradual, sequential regrowth of species in an area. |
| Primary succession | The development of a community in an area that has not supported life previously. |
| Secondary succession | The sequential replacement of species that follows disruption of an existing community. |
| Pioneer species | The species that predominate early in succession. They tend to be small, fast-growing, and fast-reproducing. |
| Climax community | A stable end point of succession. |
| Seral community | Intermediate communities that alter the physical factors of the area in a way that makes it impossible for the community to regenerate itself. |
