| A | B |
|---|
| habitat | physical environment of an organism |
| niche | role of an organism in its environment |
| biome | a geographical area defined by climate |
| species | organisms can produce fertile offspring |
| community | group of populations |
| population | group of individuals belonging to the same species |
| ecology | study of the relationship of an organism with others and its environment |
| abiotic | physical environment |
| biotic | biological environment |
| biosphere | the physical space containing living organisms |
