A population is at its carrying capacity (K) when the
A) birth rate equals zero.
B) birth rate equals the death rate.
C) population is closed to migration.
D) population growth rate is proportional to K.
E) population growth rate is at its highest level.

Question

Quizplus · Accepted Answer

When a population is at its carrying capacity (K), the birth rate equals the death rate. This means that the population is stable and neither increasing nor decreasing. If the birth rate were zero, the population would be decreasing, and if the birth rate were higher than the death rate, the population would be increasing. Therefore, B is the correct answer.

A Population Is at Its Carrying Capacity (K) When the