| A | B |
|---|
| abiotic factor | the nonliving things in an ecosystem (water,air) |
| biosphere | the area of the earth where life exists |
| biotic factor | the living parts of an ecosyste |
| commensalism | a relationship where one organism benefits and the other is not affected |
| community | a collection of interacting populations |
| population | a group of organisms of one species that interbreed and live in the same place at the same time |
| ecosystem | interactions among the populations and abiotic factors in a community |
| habitat | the place where an organism lives out its life |
| niche | the role and position a species has in its environment |
| symbiosis | a very close relationship between two organisms of different species |
| mutualism | a relationship where both organisms benefit |
| parasitism | a relationship where the parasite benefits while the host is harmed |
| predation | a relationship where the predator benefits while the prey is killed and eaten |
