Question

question 4 of 10
the graph below shows the population of mice in an ecosystem where the mice are not allowed to enter or leave.
mouse population
which best describes the population at point a?
a. the birthrate is higher than the death rate.
b. it has reached carrying capacity.
c. the death rate is higher than the birthrate

Explanation:

At point A, the population is increasing. In a closed population (no immigration or emigration), population growth occurs when the birth rate exceeds the death rate. Carrying capacity (point D) is when the population stabilizes. Since the population is rising at A, it cannot be at carrying capacity. If the death rate were higher than the birth rate, the population would decline, which is not the case at A.

Answer:

A. The birthrate is higher than the death rate.