| A | B |
|---|
| organism | lving thing |
| biotic factor | living, or once living thing(s) |
| species | group of organisms that can mate with each other and produce offspring that can also mate and reproduce |
| community | all the different populations that live together in an area |
| ecology | the study of how organisms interact with each other and with their environment |
| habitat | an environment that provides the things a specific organism needs to live, grow, and reproduce |
| abiotic factor | nonliving thing (s) |
| population | all members of one species living in a particular area |
| ecosystem | a community of organisms that live in a particular area, along with their non-living environment |
| birth rate | number of births per 1,000 individuals for a given time period |
| death rate | number of deaths per 1,000 individuals for a given time period |
| immigration | moving into a population |
| emigration | leaving a population |
| population density | the number of individuals in an area of a specific size |
| limiting factor | an environmental factor that causes a population to stop growing or decrease in size |
| carrying capacity | the largest population that an area can support |
