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2013 SCORING GUIDELINES Question 8 was written to the following Learning Objectives in the AP Biology Curriculum Framework: 3.22 Score: 3. The response earned 1 point for explaining that Step 1 induces a signal response when a ligand binds to a membrane bound receptor, resulting in the receptor altering its
The table below shows the amino acid sequence of the carboxyl-terminal segment of a conserved polypeptide from four different, but related, species. Each amino acid is represented by a three-letter abbreviation, and the amino acid residues in the polypeptide chains are numbered from the amino end to the carboxyl end.
2013 SCORING GUIDELINES Question 4 was written to the following Learning Objectives in the AP Biology Curriculum Framework: 1.15, Score: 4. The response earned 1 point in part (a) for identifying step I as photosynthesis and step II as cellular respiration. The response earned 1 point in part (a) for explaining that
AP* BIOLOGY. 2013 SCORING GUIDELINES. Ouestion 1. Glucose-Soaked. Cotton Dry Cotton. Insertion Point. Choice Chamber. In an investigation of fruit-fly behavior, a covered choice chamber is used to test whether the spatial distribution of flies is response, add up to 60, and include no cells equal to 0. (d) Explain
AP® Statistics. 2013 Scoring Guidelines. The College Board. The College Board is a mission-driven not-for-profit organization that connects students to college success and opportunity. Founded in 1900, the Essentially correct (E) if the response identifies a one-sample t-interval for a population mean (either by name or
In an experiment, rats averaging 300 g of body mass were tested several times over a three-month period. For each individual rat, urine was collected over a three-hour period after ingestion of 10 mL of liquid (water, 1 percent ethyl alcohol solution, or 5 percent ethyl alcohol solution). The volume of urine was then measured
2013 SCORING GUIDELINES Question 6 was written to the following Learning Objectives in the AP Biology Curriculum Framework: 2.5 Score: 3. The response earned 1 point for identifying locomotion as a likely function of Cell X and explaining that mitochondria synthesize ATP, which is used by the cilia for movement.
paleontology, comparative anatomy, and molecular biology. Finally, students were asked to describe two pieces of evidence provided by fossils of a transitional species that would support the hypothesis that amphibians evolved from lobe-finned fishes. Sample: 3A. Score: 4. The response earned 1 point in part (a) for
In an investigation of fruit-fly behavior, a covered choice chamber is used to test whether the spatial distribution of flies is affected by the presence of a substance placed at one end of the chamber. To test the flies' preference for glucose, 60 flies are introduced into the middle of the choice chamber at the insertion point
AP® Biology. 2013 Scoring Guidelines. The College Board. The College Board is a mission-driven not-for-profit organization that connects students to college College Board, Advanced Placement Program, AP, SAT and the acorn logo are registered trademarks response, add up to 60, and include no cells equal to 0.

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February 2018