AP BIOLOGY

Detailed explanation-1: -Density-dependent limiting factors cause a population’s per capita growth rate to change-typically, to drop-with increasing population density. One example is competition for limited food among members of a population. Density-independent factors affect per capita growth rate independent of population density.

Detailed explanation-2: -Immigration describes individuals moving into the population while emigration describes individuals exiting the population. If immigration rates are higher than emigration rates, the population increases, whereas if emigration rates are higher than immigration rates, the population size decreases.

Detailed explanation-3: -Emigration is the movement of individuals out of a population. This decreases the population size and growth rate.