Concept Organizer

 

Module Descriptions

 

There are two modules in Unit D: Module 8 and Module 9. In Module 8, you will explore the genetics of populations and how we can quantitatively measure how populations have changed. You will also investigate how many factors can interact to cause populations to evolve or remain stable. Module 9 is divided into two sections: section 9.1 and section 9.2. In Section 9.1, the emphasis is on describing the relationships that exist between organisms, the mechanisms that organisms use to protect themselves from each other, and how the species make-up of communities change over time in the process of succession. In Section 9.2, the emphasis is on how population size and changes can be measured, interpreted, and the results of the studies applied to the control of population growth. Together these modules will allow you to better understand how both an individual’s contributions to the gene pool and the interactions within communities result in change over time.

 

By studying this unit you will be able to:

  • explain how populations can change over time
  • describe the ways that members of a population interact with each other and with members of other populations
  • analyze quantitatively how populations change over time
  • analyze the technologies used by society in controlling and managing populations

The Unit D assessment follows the Diploma exam format, with a multiple-choice section and a written response question. Information from both Module 8 and both sections of Module 9 will be incorporated into the exam.

 

Module 8: Populations, Individuals, and Gene Pools


In Module 8 you will be introduced to the gene pool, and you will learn how to quantify its make-up, determine whether it is changing, and determine what factors lead to this change. You will be asked to apply your knowledge to answer the following questions: What are the factors and conditions that exist when individuals in a population can change the gene pool? How can we analyze the effects of these factors?


Module 9: Section 1—Ecological Interactions


In Module 9.1 you will look at how the interactions and symbiotic relationships between organisms affect the structure of populations and communities. You will also examine defense mechanisms that organisms use to survive predation and competition. Lastly, you will study the concept of succession, and how the species that make up communities change over time. By the end of module 9.1, you should be able to discuss the relationships that exist between species and ecosystems, and the effects that these interactions have on population changes.

 

Module 9: Section 2—Measuring, Interpreting, and Analyzing Changes in Populations

 

In Module 9.2, the focus is on population growth. Here you will learn what factors contribute to growth, and how growth within populations is measured. As part of your studies you will learn about the two major types of growth patterns and the two strategies used by organisms for maximizing growth of populations. Upon completion of module 9.2, you should be able to discuss how biologists measure, interpret, and analyze the changes in populations over time.