One indication that a population is in a period of exponential growth is that..?
A. The birth rate is slightly higher than the death rate
B. The death rate is almost equal to the birth rate
C. The death rate exceeds the birth rate
D. The birth rate far exceeds the death rate
The period of exponential growth is characterized by fast increase in the population of the organism. The number of organisms is constantly increasing. It is possible only when birth rate far exceeds the death rate. Thus, answer D is correct.