BIOLOGY Name:________________________ Chapter 35: Population and Community Ecology Section Goal: The student will describe the patterns of exponential growth, relate limiting factors and carrying capacity, compare and contrast density-dependent and density-independent factors and then identify hypotheses for the causes of population growth cycles. Vocabulary: 1. Exponential growth2. Limiting factor3. Carrying capacity4. Density-dependent factor5. Density-independent factorConcept 35.2 –There are limits to population growth I. Exponential Growth of Populations A. A population’s ability to grow partly depends on the rate at which its organisms can reproduce B. Exponential Growth is when the population multiplies at a constant factor at constant time intervals i.e. bacteria doubling every 20 minutes II. Carrying Capacity A. A population may start to grow exponentially, but eventually one or more environmental factors will limit its growth B. A limiting factor is a condition that can restrict a population’s growth C. The carrying capacity is the number of organisms in a population that the environment can maintain or “carry” III. Factors Affecting Population Growth A. Density Dependent Factors is a factor that limits a population more as a population density increases B. Density-Independent Factors are factors that limit population but are unrelated to population density IV. Population Growth Cycles A. A “boom” and “bust” growth cycle is one that increases rapidly followed by a sharp decline B. Other growth cycles are influenced by those of other populations in their environments Lesson Reflection: Complete online activity 35.2 at https://www.pearsonsuccessnet.com . Lesson Assessment: 1. Describe how a population grows with unlimited food, space, and water. 2. Describe what happens when a population reaches its carrying capacity in a particular environment. 3. Compare density-dependent and density-independent factors, and give an example of each. 4. What is a boom-and-bust population growth cycle? What might cause such a cycle? Summary of Key concepts: Complete the Summary of Key Concepts for 35.2 and turn into the box. Technology/Application/Connection to real-world: Complete the handout The Lesson of the Kaibab. Read the background, and then complete the date graph and analysis.