試題詳解

5. The growth model of a logistic population, dN/dt=rN[(K-N)/K], describes a population’s growth when an upper limit to growth is assumed. While N numerically approaches the value of K, ________________.
(A) dN/dt increases rapidly
(B) dN/dt decreases rapidly
(C) dN/dt increases slowly
(D) dN/dt approaches 0
(E) the population is extincted