Big Idea 3: Living systems store, retrieve, transmit, and respond to information essential to life processes.Big Idea 2: Biological systems utilize free energy and molecular building blocks to grow, to reproduce, and to maintain dynamic homeostasis.Big Idea 1: The process of evolution drives the diversity and unity of life.The College Board is very detailed in what they require your AP teacher to cover in his or her AP Biology course. They have guidelines for awarding partial credit, so you may still receive partial points should you not correctly respond to every part of question in your essay. Unlike the multiple-choice section, which is scored by a computer, the free-response section is graded by high school and college teachers. You will have 90 minutes to answer all 6 questions. The free response section consists of two long-form free-response questions, both of which require data analysis, and four short-form free-response questions that require a paragraph-length response that covers your ability to describe, explain, predict, justify, or represent a given scenario. The 60 multiple-choice questions test your grasp of the fundamentals of biology and your ability to apply biological concepts to help solve problems. COVID-19 Update: To help students through this crisis, The Princeton Review will continue our 'Enroll with Confidence' refund policies.