Question

Exponential population growth is represented by

• A. dN / dt = rN
• B. dt / dN = rN
• C. dN / rN = dt
• D. rN / dN = dt

Answer 1

The correct option is A dN / dt = rN

Population growth rate measures the number of individuals in a population (N) over time (t). When the conditions are ideal, the type of growth is known as exponential form of growth which is expressed by the equation, (dN)/(dt)= rN. When the limiting factors is restricted, the growth pattern is known as logistic growth model. This model is described by the differential equation (dN)/(dt)= rN(K-N)/K, where K is the carrying capacity and r is the maximum per capita growth.

Therefore, the correct answer is option A.