| A | B |
|---|
| biosphere | parts of the earth that support life |
| tertiary consumers | often the top of energy pyramid; owls, etc. |
| symbiosis | every type of close relationship between two or more species |
| population | organisms of the same species that live in the same place and can produce offspring |
| habitat | the physical location where an organism can live |
| community | groups of populations that interact in a given are called |
| nitrogen | makes up the largest portion of the atmosphere |
| water cycle | includes condensation, evaporation, and precipitation |
| ecosystem | the biotic community and the abiotic factors that affect it |
