A population will remain at a constant size when emigration equals immigration and
A) food is not a limiting factor.
B) births equal deaths.
C) predators leave the area.
D) available space remains the same.

Question

Quizplus · Accepted Answer

A constant population size requires that the number of individuals leaving the population is equal to the number of individuals entering the population. Therefore, emigration equaling immigration is necessary, but not sufficient. Additionally, births must equal deaths in order to maintain a constant population size. The other choices - food availability, predator presence, and available space - may affect population growth or decline, but are not necessary for a population to remain at a constant size.

A Population Will Remain at a Constant Size When Emigration