| A | B |
|---|
| habitat | provides food, water, & shelter |
| biotic | living |
| abiotic | nonliving |
| organism | an individual (smallest level of ecological organization) |
| population | all the members of one species in a particular area |
| community | all the different populations that live together in a particular area |
| ecosystem | the community of organisms living in a particular area, along with nonliving surroundings |
| limiting factors | A factor that controls the abundance or distribution of a population of organisms in an ecosystem |
| birth rate | the number of births in a population |
| death rate | the number of deaths in a population |
| immigration | moving into a population |
| emigration | leaving a population |
| population statement | a statement that indicates if a population is increasing or decreasing |
| estimate | an approximation of a number based on resonable assumptions |
