Leucine aminopeptidases (LAPs) are found in all living organisms and have been associated with the response of the marine mussel, Mytilus edulis, to changes in salinity. Water - atmospheric water vapor. Evolution College College Board AP Biology 1 - 7 Transitional fossil, Tiktaalik Board AP Biology 1 -. boats trader. Free-Response Questions. Directions Questions 1 and 2 are long free-response questions that require about 25 minutes each to answer. Provide reasoning for the reduced initial population sizes. 1 17. the Fossil record 3. explain what the statement "natural selection depends on time and place" means. The brown anole (Anolis sagrei) is a type of lizard that is native to islands in the Caribbean Sea. Free-Response Questions. Unit 5 Heredity. 1 - Campbell Biology (11th Edition) (Editor&x27;s Choice) The Campbell AP Biology review book offers understandable content with the innovative use of art and photos to enhance teaching and learning. 10 terms. Lesson 1 Worked examples - 2015. Time1 hour and 30 minutes. Start Quiz. The exam covers the following course content categories. Study with Quizlet and memorize flashcards containing terms like 1. 21 terms. Prompt 1 Biologists are interested in preserving the diversity of living organisms on the planet. 2a-b, Cellular respiration & common ancestry. the Calvin cycle produces both sugar and O2. The free-response section consists of two long-form questions and six short-form questions, which assess students&39; understanding of the course material and their ability to apply it to real-world scenarios. (b) Use each of the following observations to justify the claim that glycolysis first occurred in a common ancestor of all living organisms. Includes answers for multiple choice along with thorough explanations. AP Biology - A Site maintained by the University of Georgia dedicated to improving the AP Biology Program. The multiple choice part of the AP Bio test has 60 questions. The AP Biology exam is graded on a scale of ane-5, and you tin can earn college credits at many colleges for receiving a score as low as a 3, which is estimated to be approximately equivalent to earning a C, C, or B- in a college-level biology course. Immune System Chart. 2, ENE-2. AP Biology 2010 Free-Response Questions The College Board The College Board is a not-for-profit membership association whose mission is to connect students to college success and opportunity. 5 hours. Cell theory. AP Biology 2010 Free-Response Questions The College Board The College Board is a not-for-profit membership association whose mission is to connect students to college success and opportunity. The free-response section consists of two long-form questions and six short-form questions, which assess students&39; understanding of the course material and their ability to apply it to real-world scenarios. Are you preparing for the AP Biology exam Do you want to see how well you can answer the free-response questions Check out this pdf file that contains the sample responses for question 1 of the 2017 exam, along with the scoring guidelines and commentary. Find step-by-step solutions and answers to Environmental Science for AP - 9781464108686, as well as thousands of textbooks so you can move forward with confidence. Most environmental resources are randomly distributed. 2019 1 2019 Free -Response Questions Scoring Guidelines Sample Responses Q1 Central Dogma Effect of genetic mutation on pathway. 32M (0. 126 terms. The overall reaction breaks down a carbohydrate, most frequently modeled by glucose, and converts the energy stored in that molecule into the most basic cellular energy, ATP. 42 terms. AP Physics C Electricity and Magnetism. hpu Created Date 422023 120333 PM. Below are official notes on each of these labs for you to review. WASHINGTON (MarketWatch) -- For the second time this week, the Associated. Study with friends using the 1 virtual studying platform for students. Unit 8 Evolution. AP Biology is known for being one of the tougher AP exams, and, for most students, the free-response section is the hardest part of the test. Cain, and Peter V. 2017 8 Answer Key. Practice Online AP Biology 7. 2 horse trailer with living quarters for sale ; pip win32com ; how old are anne heche children. What inherited feature, in specific combinations, determines an organism&x27;s traits 4. I am adding some extra information into the answers to do some explanation that might not be needed on those questions. AP Biology 2008 Scoring Guidelines The College Board Connecting Students to College Success The College Board is a not-for-profit membership association whose mission is to connect students to college success and opportunity. AP Biology is a tough test but Albert can help you score a 5. Below are two different practice exams. (a) Explain the role of each of the following in protein synthesis in eukaryotic cells. The breakdown of topics on the exam are as follows Unit 1 Chemistry of Life - 8-11. Observation Justification (1 point each box; 3 points maximum. 35 terms. the energy contained in the standing crop. The curriculum of AP Biology is not a set of facts to be memorized so much as it is a landscape to explore, a landscape in which the boundaries continue to. 5 hours. You will have 90 minutes to complete the 6 free response questions on the AP Biology exam. Which of the following sciences is not considered a natural science astronomy. This online broadcast Ultimate. After reviewing the material, we answered a free response question from a previous AP Bio exam. Founded in 1900, the College Board was created to expand access to higher education. Labeled diagrams may be used to supplement discussion, but in no case will a diagram alone suffice. your understanding with detailed answer explanations and expert advice Gain confidence with scoring to check your learning progress AP Biology Premium, 2022-2023 5 Practice Tests Comprehensive Review Online Practice - Mary Wuerth 2022-02-01 Power up your study sessions with Barron&39;s AP Biology on Kahoot--additional, free prep to. The human genome illustrates both continuity and change. AP Biology Insta-gevlew apbiopenguins. The response earned 1 point in part (b) for correctly drawing a "Cuckoos Removed" bar for Group 2 that is lower than the "Warblers and Cuckoos" bar. During an investigation of a freshwater lake, an AP Biology student discovers a previously unknown microscopic organism. The AP Biology exam is graded on a scale of ane-5, and you tin can earn college credits at many colleges for receiving a score as low as a 3, which is estimated to be approximately equivalent to earning a C, C, or B- in a college-level biology course. 25 terms. 37 and 0. This will assist you in organizing your thoughts, as well as helping to ensure that you answer all the parts of the free-response question. 65 20 3. 019 - Response to External Environments. The materials included in these files are intended for use by AP teachers for course and exam preparation; permission for any other use must be sought from the Advanced Placement Program. 2013 6. Outline form is not acceptable. 3a-b, Phylogeny. details of structures inside cells. We should never have to remind ourselves that science is a process, not a body of knowledge. Natural selection favors the mice with the light coat color, causing the mice in all. (a) Use the phylogenetic tree in Figure 1 to estimate the age in hundreds of thousands of years of the most recent common ancestor of all brown bears. Scoring Guidelines. Teacher 55 terms. The wing of a bat and the wing of a bird both play a role in flight. 38 141 2. Show all your work and explain the importance of your final answer. Several different crosses were performed, each using 100 females and 100 males. bio exam 2 lesson 5. and more. Figure 23. Many species have circadian rhythms that exhibit an approximately 24-hour cycle. mt airy horse sale catalog. I, ENE-2. A large population of laboratory animals has been allowed to breed randomly for a number of generations. Homology 4. So if you get 10 things on the rubric right, but state 15 wrong facts it. In a population of 1,000 organisms, the fraction expressing the homozygous recessive phenotype is 0. Behavior maybe culturally transmitted or learned (e. Topics may include The structure and chemical properties of water. Figure 17. Biology for AP Courses - Julianne Zedalis 2017-10-16 Biology for AP courses covers the scope and sequence requirements of a typical two-semester Advanced Placement biology course. level 2. 2 horse trailer with living quarters for sale ; pip win32com ; how old are anne heche children. Brown bears, black bears, and pandas are found in warmer environments. 2 0 11 B 1. The remainder of AP Biology consists of genetics, evolution, and ecology. Not all free-response questions on this page reflect the current exam, but the question types and the topics are. If you. 1 mM CAFFEINE ON MEMORY IN BEES Memory (average probability of revisiting a nectar source 2SE-) Treatment X 10 Minutes 24 Hours Control 0. have the most genetic divergence C. AP Physics C Electricity and Magnetism. The AP Biology exam is divided into two sections multiple-choice and free-response. Page 6 AP Biology 2013 Exam Review Biochemistry - Short Free Response (4 points) Water is importan t for all living organisms. Questions 3 through 6 are short free-response questions that require about 10 minutes each to answer. your understanding with detailed answer explanations and expert advice Gain confidence with scoring to check your learning progress AP Biology Premium, 2022-2023 5 Practice Tests Comprehensive Review Online Practice - Mary Wuerth 2022-02-01 Power up your study sessions with Barron&39;s AP Biology on Kahoot--additional, free prep to. , Draw the basic structure of an amino acid and label the groups that are used in peptide bond formation. TeachersExplore Resources. B Describe Introduction andor processes. 2018 AP MACROECONOMICS FREE-RESPONSE QUESTIONS MACROECONOMICS Section II Total Time1 hour. 019 - Response to External Environments. A new species of fly was discovered on an island in the South Pacific. 2021 exam biology answers ap biology on the app store - Aug 16 2021 web read reviews compare customer ratings see screenshots and learn more about biology answers ap biology download biology answers ap biology and enjoy it on your iphone ipad and ipod touch biobrain is an essential learning tool for. AP Exams are regularly updated to align with best practices in college-level learning. - poly-a-tail removal poly-a-tail can be removed from the 3&x27; side allowing exonucleases to degrade. The nonconstancy of species. the recessive allele will disappear in a few generations. Study Tools. 1 mM CAFFEINE ON MEMORY IN BEES Memory (average probability of revisiting a nectar source 2SE-) Treatment X 10 Minutes 24 Hours Control 0. Terms in this set (31) macroevolution. Provide reasoning for the reduced initial population sizes. Short Answer Salty Celery ENE-2. It clearly lays out the course content and describes the exam and the AP Program in general. 84 &92;times 105 &92;mathrm km 3. The formation of a proton gradient by the electron transport chain keeps the ionic Hydrogens on the outside of the cell so that they go through the ATP synthase. -2-BIOLOGY Section II 8 Questions Planning Time ------10 minutes Writing Time ------80 minutes Directions Questions 1 and 2 are long free-response questions that require about 22 minutes each to answer and are worth 10 points each. Appendix A Preparing Students for. The fossil record provides a historical record of the gradual changes that have occurred in organisms over time. gazebo metal. Glycolysis occurs under anaerobic conditions. You will get a 10-minute reading period between the multiple-choice and free-response sections. Direct observations 2. Mutations resulting from natural selection have created new. The New AP Biology Exam - A User&39;s Guide · The 2013 AP Biology Exam Reflections. Start Quiz. jack showalter idaho. AP Biology Unit 5 Heredity Topics - Meiosis, Meiosis and Genetic Diversity, Mendelian Genetics, Non-Mendelian Genetics, Environmental Effects on Phenotype, Chromosomal Inheritance Directions - For each question, choose the best answer (unless otherwise stated) Test Period - You have 22 minutes 30 seconds to answer 30 questions. I am adding some extra information into the answers to do some explanation that might not be needed on those questions. Biology for AP Courses was designed. why is nbc not working on xfinity; proxmark3 clone mifare; Top 10. 60 terms. Labeled diagrams may be used to supplement discussion, but in no case will a diagram alone suffice. AP BIO Evolution Review. A large population of laboratory animals has been allowed to breed randomly for a number of generations. These include the following. The response earned 1 point in part (b) for reasoning that gene H mRNA "was never translated. Questions 3 through 6 are short free-response questions that require about 10 minutes each to answer. Outline form is not acceptable. 10 terms. Page 153 Module 14 Review Questions. Unit 2 FRQ (Vacuole pH) with Feedback. natural selection is the most important agent in evolutionary change. This is an utterly simple means to specifically get lead by on-line. I've been thinking about it since exam day, and I really feel like both a line and bar graph are. AP Biology 2021-2022 Class Handouts. Cephalization and the development of a brain were important steps in animal evolution. allopatric speciation in which a population of one species becomes physically separated by a barrier (river, mtn range, etc) and after an extended period of time, the populations become isolated, eventually. You will have ninety minutes to answer sixty multiple-choice questions, which means you have a little more. 004 - Evidence for Evolution. Stand Alone Question 1. (The response does not adequately. solved questions of journal entries with ledger and trial balance. SECTION II. Natural selection. 25 AP Biology FRQ Tips to Scoring a 4 or 5. 2 0 1 5 2. Source The Biology Notes. A) The catabolism of glucose in glycolysis gives the NAD the Hydrogen it needs to later be turned into ATP. Justify your choice. AP Biology Practice Test 1 Evolution - High School Test Prep AP Biology Practice Test 1 Evolution Question 1 Which of the following statements does not describe natural selection Question 2 Evidence from which of the following does not support evolution. artificial selection. Provide reasoning for the reduced initial population sizes. Free Response Section. AP Biology Review Guide This is a BEAST, but it walks through the entire Course & Exam Description (CED) with I can statements, questions, and practice multiple choicefree response for each unit. Biodiversity on the AP Environmental Science Exam. 3 min read. 9xflix homepage 2022. The organisms with the best suited characteristics for their environment will live to reproduce, and pass those characteristic on to their offspring. This is genetic change, or evolution. In part (b) students were asked to identify an independent variable in the experiment represented in Figure 1, to. ENE-1, EVO-1. Evolution FRQ. Study with Quizlet and memorize flashcards containing terms like 1. Teachers may reproduce them, in whole or in part, in limited quantities, for face-to-face. AP Biology Hardy-Weinberg Practice Problems ANSWER KEY 1. The questions that follow are typical of a broad and a more focused AP biology test question. 32M (0. 3 in Topic 2. Unit 7 Natural selection. AP Biology. AP BIO ap bio. 013 - Photosynthesis & Respiration. sonobello reviews evorel conti patches harnal ocas fifa 22 ps4 pkg bmw wheel paint code 144 match fishing skegness amazon broom. vestigial structures. You will likely spend more time on each of the two long free-response questions than on each of the four short-response questions. AP Biology Practice Test 1 Evolution pdf download; AP Biology Practice Test 2 Common Ancestry pdf download; AP Biology Practice Test 3 Life Continues to Evolve pdf download. the genotype frequencies for the black hair locus are 25 homozygous dominant BB 71 heterozygous Bb and 4 homozygous recessive bb. Northern blotting is similar to Southern blotting, but RNA is run on the gel instead of DNA. It has a felt-like gray surface and bores into crepe myrtles to consume the sap, and excretes black waste that covers the bark of the trees. Tap the card to flip. acquired traits could be passed down. Make a predictionJustify. similarity in characteristics resulting from a shared ancestry. AP Biology Unit 3 FRQ Exam Prep. We have links to all of the best AP Biology notes that are available online. AP Biology Practice Test 1 Evolution - High School Test Prep AP Biology Practice Test 1 Evolution Question 1 Which of the following statements does not describe natural selection Question 2 Evidence from which of the following does not support evolution. Questions 3-8 are short free-response questions that require about 6 minutes each to answer. This eBook edition has been formatted for on-screen viewing with cross-linked questions, answers, and explanations. Generations time needed for evolution to occur Elaboration expansion of Darwins ideas such as the effects of environmental change or. sum of all data points divided by number of data points. Describe the phases of the cell cycle. The rate of pyruvate conversion is greatly reduced in individuals with PDC deficiency, a rare disorder. AP Biology The Exam AP Biology Past Exam Questions AP Biology Past Exam Questions Free-Response Questions Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. This evidence supports the idea that species have. Two populations of zebras become separated by a barrier and overtime become different species 6. sdrplay rspduo. A large population of. Study relevant content areas and revise test-taking strategies 2 hours. mt airy horse sale catalog. Learn all material in the AP Macroeconomics curriculum from highly regarded AP instructors and college professors. A compilation of all College Board free-response questions to practice with, broken down into easy-to-understand terms. ENE-1, EVO-1. You can also view all of the College Board&x27;s AP Bio classroom resources on the College Board&x27;s website. Justify your choice. AP Bio Evolution FRQs. The second Think About It questions are applications AP Learning Objective 1. 2 Practice worksheet, do in class Fri 830. Two populations of zebras become separated by a barrier and overtime become different species 6. Question 8. 1 min read. Lab 8 Population Genetics and Evolution. Feedback mechanisms. Questions 3-5 are worth 4 points each and questions 6-8 are worth 3 points each. Pack taught AP Biology for eleven years. Identify the choice that best completes the statement or answers the question. bears are most closely related based on the mitochondrial DNA sequence comparison. 2019 frqs ap bio 2019 frqs long frq 1 gene expression and regulation, . A deep dive into how life on Earth originated, adapted, and flourished. " Four of his contributions to the field of evolutionary biology are listed below. The document shows the steps of the test, the interpretation of the results, and the biological significance of the findings. Question 1 was written to the following Learning Objectives in the AP Biology Curriculum Framework 1. 8 Continuing Evolution; 7. The cells produced are genetically unique because of the random assortment of paternal and maternal homologs and because of the recombining of maternal and paternal segments of chromosomes (with their sets of genes) that occurs during crossover. the Fossil record 3. Outline form is not acceptable. Read each question carefully and completely. The evolution of circulatory systems allowed. lilytrainingflex onlyfans, ge gxsh40v water softener
your understanding with detailed answer explanations and expert advice Gain confidence with scoring to check your learning progress AP Biology Premium, 2022-2023 5 Practice Tests Comprehensive Review Online Practice - Mary Wuerth 2022-02-01 Power up your study sessions with Barron&39;s AP Biology on Kahoot--additional, free prep to. . Ap bio evolution frq answers
The free-response section consists of two long-form questions and six short-form questions, which assess students&39; understanding of the course material and their ability to apply it to real-world scenarios. Write all your answers on the pages following the questions in the goldenrod booklet. Pose a scientific question that connects the subcellular location of the enzymes in the Krebs cycle to the evolution of. pdf from BIOLOGY BIOL3150 at Boston College. ibberellin is the primary plant hormone that promotes stem elongation. AP Biology AP Biology Exam Free-Response Question and Scoring Archive AP Biology Archived Free-Response Questions and Scoring Guidelines Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. AP BIO UNIT 6 FRQ. All modern birds are descended from a group of dinosaurs called theropods. (a) Describe one measure of evolutionary fitness. Multiple Choice. You are advised to spend the 10-minute reading period planning your answers. AP Bio FRQ review. I used last year&x27;s doc as a template, I uploaded all questions in this. AP Biology 2013 Scoring Guidelines. Which of the following sciences is not considered a natural science astronomy. 4 and the frequency of the dominant allele (A) is 0. Read each question carefully and completely. Carbon, in the form of CO 2, must be taken from the atmosphere and attached to an existing organic molecule in the Calvin cycle. 87, 2019 was 2. Ap bio phylogenic tree frq. Central Dogma. Read each question carefully and completely. The free-response section consists of two long-form questions and six short-form questions, which assess students&39; understanding of the course material and their ability to apply it to real-world scenarios. This shall be worth 40 of your exam grade. 10 terms. Note Some questions and scoring guidelines from the 2023 and earlier AP U. The test tube was inverted several times to mix the solution and then incubated at 25C. Cross I True-breeding bronze-eyed males were crossed with true-breeding red-eyed females. sum of all data points divided by number of data points. Similar to using genetic code as an example for evolutionary theory, there are other examples of evidence at the molecular level. Effect of genetic mutation on pathway. Option 2 The (average) beak (in the population) will be longer and deeper. hpu Created Date 422023 120333 PM. AP BIOLOGY 2017 SCORING GUIDELINES Question 1 TABLE 1. Two of those questions are in the "short" form, and these consist of 50 of the free response score, or 25 of your total score. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssdinfo. Glycolysis is a crucial part in cellular respiration (and is the first step), which. Draw areas within the box to represent the rates of growth (G) and respiration (R) to show the limit of each on the overall growth rate. You can access a full practice exam here. Biology Chapter 4 study guide. The Review Guide Practice Exam has all of the questions from 2012 CED & 2020 CED. pdf from BIOLOGY BIOL3150 at Boston College. Practice is crucial to divide your time efficiently. bio frqs. 9 Phylogeny; 7. The materials included in these files are intended for noncommercial use by AP teachers for course and exam preparation; permission for any other use must be sought from the Advanced Placement Program. 0 (2 reviews) Use the phylogenetic tree in Figure 1 to estimate the age in hundreds of thousands of years of the most. The response earned 1 point in part (b) for explaining that Mutant 1 has a mutation that prevents it from synthesizing methionine, but it survives when all of the amino acids are present. biology unit 2 - prof martin. 11, and 1. This eBook edition has been formatted for on-screen viewing with cross-linked questions, answers, and explanations. bears are most closely related based on the mitochondrial DNA sequence comparison. We have links to all of the best AP Biology notes that are available online. Find answers to common questions from AP students. TeachersExplore Resources. Source The Biology Notes. The response earned 1 point in part (c) for drawing circles around the top three species in the. Sakdale 1 yr. Unit 3 Cellular energetics. Study with Quizlet and memorize flashcards containing terms like 1. , (c) Describe the hormone. The following table shows the percentage similarity in . 4 min read november 15, 2021. 63 and 0. Founded in 1900, the association is composed of more than 5,000 schools, colleges, universities, and other. (a) The Moon&x27;s orbital radius is 3. Note Some questions and scoring guidelines from the 2023 and earlier AP U. Biology Exam 1 Study Guide Chapter 3. The rate of pyruvate conversion is greatly reduced in individuals with PDC deficiency, a rare disorder. Unit 3 Cellular energetics. The breaks are either repaired by the exchange of genetic material between homologous nonsister chromatids, which is the process known as crossing over. Ch 40, 45 Animal Form & Endocrine Review. Unit 7 Natural selection. Test Booklet 2020 Practice Exam 1 FRQ (Part I) AP Biology Page 3 of 4 (d). Macaque hemoglobin binding ability of different strains of S. This shall. , (b) Identify a dependent variable in the experimental design. AP Biology Phylogeny Free Response Questions Question 1 Figure 1. AP Biology 2013 Scoring Guidelines. 1-1 . details of structures inside cells. changes to the genetic information of a cell or virus. All the FRQs, regardless of whether they&x27;re long or short, come in 4 parts, and most of them follow this general pattern a. Questions 3 through 8 are short free-response questions that should require about 6 minutes each to answer. The results are shown in the table below. 6 terms. the most likely difference in phenotype of the transgenic mouse strain compared to the wild-type mouse strain. Get extra preparation for an excellent AP Biology score with 550 extra practice questions and answers. Exams may not be posted on school or personal websites, nor electronically redistributed for any reason. The AP Biology exam is graded on a scale of ane-5, and you tin can earn college credits at many colleges for receiving a score as low as a 3, which is estimated to be approximately equivalent to earning a C, C, or B- in a college-level biology course. Put your AP Bio Unit 3 knowledge to the testUnderstand what topics you need to study more. your understanding with detailed answer explanations and expert advice Gain confidence with scoring to check your learning progress AP Biology Premium, 2022-2023 5 Practice Tests Comprehensive Review Online Practice - Mary Wuerth 2022-02-01 Power up your study sessions with Barron&39;s AP Biology on Kahoot--additional, free prep to. Differential Survival. The College Board is a mission-driven not-for-profit organization that connects students to college success and opportunity. the population isnt in HWE. I am adding some extra information into the answers to do some explanation that might not be needed on those questions. 84105 km and it orbits Earth once every 27. Population genetics b. Evolution 2. Only 9. Over the course of two years, the scientists measured the survival rate of sand lance embryos allowed to develop and mature in a laboratory at three different. 3 min read. Effect of genetic mutation on pathway. Study with Quizlet and memorize flashcards containing terms like (1a) Describe what scientists mean when they refer to an ecological community such as that shared by the leopards and lions. Unit 1 Chemistry of Life. Biological species concept a species is a reproductively isolated population able to interbreed and produce fertile offspring. Write all your answers on the pages following the questions in the pink booklet. AP Biology - Evolution Unit Practice Exam. For a particular genetic locus in a population, the frequency of the recessive allele (a) is 0. Evolution FRQs 2003 B Evolution Biologists are interested in preserving the diversity of. Use the phylogenetic tree in Figure 1 to estimate the age in hundreds of thousands of years of the most recent common ancestor of all brown bears. although most of the answer specifies only the mitotic cycle. It is important that you understand the rubrics and question styles going into. The exam consists of two main sections Multiple-Choice and Free-Response. the good and the beautiful language arts answer key. We can refer to the AP Student Score Distributions, released by the College Board annually. Key points. Study with Quizlet and memorize flashcards containing terms like a) Describe TWO characteristics shared by ecosystems that have high biodiversity. Writing Time----- -80 minutes. 3 Prevention and Treatment of Viral Infections; 21. The rate of pyruvate conversion is greatly reduced in individuals with PDC deficiency, a rare disorder. A) The catabolism of glucose in glycolysis gives the NAD the Hydrogen it needs to later be turned into ATP. AP Biology Development Committee, in conjunction with ETS test developers. unit 8 FRQ questions & answers. AP Biology AP Classroom Unit 7 FRQ. AP Biology is known for being one of the tougher AP exams, and, for most students, the free-response section is the hardest part of the test. Unequal survival will lead to a gradual change in population. This PDF document contains a sample response for question 2 of the AP Biology 2013 exam, which asks students to design an experiment to test the role of sugar in attracting fruit flies. Trichomes are hairlike outgrowths of the epidermis of plants that are thought to provide protection against being eaten by herbivores (herbivory). . popular only fans leaks