| A | B |
| Omnivores | feed on both plants and animals |
| Carnivores | Animals that feed on other animals |
| Parasitism | One organism benefits while the other is harmed |
| Mutualism | A symbiotic relationship which both organisms benefit |
| Primary Consumers | Are always herbivores, because they are animals that eat green plants. |
| Food web | A interconnecting food chain forms a...? |
| Climax community | A stable community |
| Pioneer organisms | The first organisms to populate an area |
| Ecological succession | the replacement of one community by another |