AP BIOLOGY

Detailed explanation-1: -With a negative relationship, population growth is limited at low densities and becomes less limited as it grows. Density-dependant factors may influence the size of the population by changes in reproduction or survival.

Detailed explanation-2: -What is the best biological explanation for why the Daphnia population growth rate became negative between days 70 and 105? The population exceeded the carrying capacity and started running out of resources during that period.

Detailed explanation-3: -What is the best biological explanation for why the population stayed below the carrying capacity between days 100 and 160? a)Overcrowding before day 100 caused the birth rate to decrease and the death rate to increase, and it took another 60 days for the relative rates to stabilize.

Detailed explanation-4: -Answer and Explanation: The correct answer is (B) If a population is at the carrying capacity of the environment, then the birth rate will more or less equal the death rate (i.e., zero population growth).