Explain why a decrease in population growth rate is expected as a nonhuman population approaches carrying capacity.

Add labels to the figure that follows, which illustrates the predicted pattern of changes in human population growth rates when death rates fall.

A population's carrying capacitya. may change as environmental conditions change.b. can be accurately calculated using the logistic growth model.c. increases as the per capita population growth rate decreases.d. can never be exceeded.

The graph below shows the demographic transition for a hypothetical country. Many developed countries that have achieved a stable population size have undergone a transition similar to this. Answer the following questions concerning this graph. a. What does the blue line represent? The red line? b. This diagram has been divided into four sections. Describe what is happening in each section. c. In which section(s) is the population size stable? d. In which section is the population growth rate the highest?

In what populations does exponential growth tend to occur?a. populations that colonize new habitatsb. populations that experience intense competitionc. populations that experience high rates of predationd. populations that have surpassed their carrying capacity

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx has revealed thata. predation is the dominant factor affecting prey population cycling.b. hares and lynx are so mutually dependent that each species cannot survive without the other.c. both hare and lynx population sizes are affected mainly by abiotic factors.d. the hare population is r-selected and the lynx population is K-selected.

After seeds have sprouted, gardeners often pull up some of the seedlings so that only a few grow to maturity. How does this practice help produce the best yield?a. by increasing Kb. by decreasing rc. by reducing intraspecific competitiond. by adding a density-independent factor to the environment

If most individuals in a population are young, why is the population likely to grow rapidly in the future?a. Death rates will be low.b. The population has a skewed age distribution.c. Immigration and emigration can be ignored.d. Many individuals will begin to reproduce soon.

When individuals in a population are evenly spaced throughout their habitat, their dispersion is termed as .a. clumped;b. uniform;c. random;d. excessive;e. exponential