| A | B |
|---|
| Carrying capacity | The largest population that an environment can support over a long period of time. |
| Exponential growth | Occurs when a population doubles at a regular rate, such as every 20 minutes, or every 30 years. |
| Population density | The number of individuals of the same species living in a given area. |
| Density-dependent limiting factor | A factor that limits the size of a population. It effects large or crowded populations. |
| Niche | An organism's role in its environment. |
| Emigration | The movement of organisms out of an area. |
| Biotic factor | All the living things in the environment and their effects on the organism. |
| Immigration | The movement of organisms into an area. |
| Density-independent factor | A factor that limits the growth of a population regardless of its size. |
| Abiotic factor | The nonliving things that affect an organism. |
