| A | B |
|---|
| symbiosis | Different species living closely together |
| commensialism | Symbiosis - one benefits, the other not harmed |
| mutualism | Symbiosis - both organisms benefit |
| parasitism | Symbiosis - one benefits, one harmed |
| autotrophs | self-feeding, usually photosynthesis |
| heterotrophs | feeding on others |
| herbivores | plant eaters |
| carnivores | animal eaters |
| omnivores | eat plants and animals |
| scavengers | feed on dead things they find |
| predator | actively catches its food |
| prey | eaten by predators |
| biotic | living factors of the environment |
| abiotic | non-living portion of the environment |
| limiting factors | things restricting population size |
| tolerance | ability to survive environmental fluctuations |
| carrying capacity | number of a species the environment can support |
| population | number of individuals of a species in an area |
| community | interacting populations |
| ecosystem | communities and their environment |
| biosphere | part of the earth where things live |
| biome | ecosystems with similar plants and environmental conditions |
| succession | over time one species replaces another |
| climax community | a community from succession changing little |
| competition | organisms trying for the same resources |
| niche | the role a species plays in the ecosystem |
| habitat | the place an organism lives |
