| A | B |
|---|
| Population | All the members of a species that live in the same area and make up a breeding group. |
| Population size | The number of of individuals that it contains. |
| Population density | A measure of how crowded a population is. |
| Dispersion | The spatial distribution of individuals within a population. |
| Birth rate | The number of births occuring in a period of time. |
| Death rate (Mortality rate) | The number of deaths in a period of time. |
| Life expectancy | How long, on average, and individual is expected to live. |
| Age structure | The distribution of individuals among different ages in a population. |
| Survivorship curves | Show the likelihood of survival at different ages throughout the lifetime of the organism. |
| Growth rate | The amount by which a population's size changes in a given time. |
| Immigration | The movement of individuals into a population. |
| Emmigration | The movement of individuals out of a population. |
| Exponential model | A population that increases rapidly after only a few generations. |
| Exponential growth | The larger the population gets, the faster it grows. |
| Limiting factor | A factor that restrains the growth of a population. |
| Logistic model | Growth builds on the exponential model but accounts for the influence of limiting factors. |
| Carrying capacity | The number of individuals the environment can support over a long period of time. |
| Logistic growth | When the population's birth rate equals the death rate at the carrying capacity. |
| Density-independent factors | Factors that control the population size regardless of the number of individuals it includes. Ex. weather. |
| Density-dependent factors | Factors that control the population size like resources limitations that are triggered by increasing population density. |
| Inbreeding | Mating with relatives. |
| Hunter-gather lifestyle | A way of life in which people obtain food by hunting and gathering wild animals and plants. |
| Agricultural revolution | When humans began to domesticate animals and cultivate certain plants for food. |
| Developed country | All of the world's modern, industrialized countires. |
| Developing country | Countries is Asia, Central America, South America, and Africa. |
| Demographic transition | The general pattern of demographic change from high birth and death rates to low birth rates and death rates, as observed in the history of more-developed countries. |
