| A | B |
|---|
| population density | number of individuals per unit of area |
| immigration | movement of individuals into an area occupied by an existing population |
| emigration | movement of individuals out of an area |
| exponential growth | growth pattern in which the individuals in a population reproduce at a constant rate |
| logistic growth | growth pattern in which a population's growth rate slows or stops following a period of exponential growth |
| carrying capacity | largest number of individuals of a population that a given environment can support |
| limiting factor | factor that causes the growth of a population to decrease |
| density-dependent limiting factor | limiting factor that depends on population size |
| predator-prey relationship | mechanism of population control in which a population is regulated by predation |
| density-independent limiting factor | limiting factor that affects all populations in similar ways, regardless of population size |
| demography | scientific study of human populations |
| demographic transition | change in a population from high birth and death rates to low birth and death rates |
| age-structure diagram | graph of the numbers of males and females within different age groups of a population |
