Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

Exercise 14

What is the key concept for this section Define population. Why do most populations live in clumps List four variables that govern changes in population size. Write an equation showing how these variables interact. What is a population's age structure and what are the three major age groups called Define range of tolerance. Define limiting factor and give an example. State the limiting factor principle. Define population density and explain how some limiting factors can become more important as a population's density increases. Describe two different reproductive strategies that can enhance the longterm survival of a species.