a. In an exponential growth environment, the population growth rate is constant and does not change over time. Therefore, the population growth rate for this population of mice remains 0.2.b. If the population of mice had a carrying capacity of 1000, it means that the population growth would be limited by available resources once the population reaches 1000. This situation would follow a logistic growth model rather than exponential growth. To calculate the population growth rate under logistic growth, you would need additional information such as the current population size and the carrying capacity.
