| Term | Definition |
| population | group of individuals belonging to the same species that live in the same area |
| population size | total number of individuals in a population |
| population density | number of individuals in a given area |
| dispersion | pattern of distribution of organism in a population |
| growth rate | number of individuals added or lost in a population |
| exponential growth | rapid increase in an exponentially growing population |
| carrying capacity | population size that an environment can sustain |
| logistic growth | population growth that is limited at the carrying capacity |