| A | B |
|---|
| population density | number of individuals per unit area |
| age structure | number of males and females of each age in a population |
| 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 slows and then stops following a period of exponential growth |
| carrying capacity | largest number of individuals of a particular species tht a particular environment can support |
| limiting factor | factor that causes population growth to decrease |
| density-dependent limiting factorr | limting factor that depends on population density |
| density-independent limitng factor | limiting factor that affects all populations in similar ways, regardless of the population density |
| demography | scientific study of human populations |
| demographic transition | change in population high birth rates and death rates to low birth rates and death rates |
