Contrast population size with population density. What is the relationship between the terms species and population? Describe how a population grows with unlimited food, space, and water. Describe what happens when a population reaches its carrying capacity in a particular environment. Describe tow methods predators use to help them capture their prey and two methods prey use to help them avoid being eaten. What is the main difference between primary and secondary succession? Describe the pattern of human population growth over the last 500 years. What are some factors that have contributed to this pattern? Explain the concept of carrying capacity.