Preparing for the AP Biology exam requires a deep understanding of many different topics in biology as well as an understanding of the AP exam and the types of questions it asks.  This course is Part 4 of our XSeries: Preparing for the AP* Biology Exam and it is designed to prepare you for the AP Biology exam.    In Part 4, you will learn about ecology, the interactions between organisms, how they depend on each other, how they interact with their environment and how they compete with each other.   As you work through this course, you will find lecture videos taught by expert AP Biology teachers, practice multiple choice questions and free response questions that are similar to what you will encounter on the AP exam and tutorial videos that show you step-by-step how to solve problems.  By the end of the course, you should be ready to take on the AP exam!