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Unformatted text preview: AP® Biology
2004 Free-Response Questions
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For the College Board’s online home for AP professionals, visit AP Central at apcentral.collegeboard.com. 2004 AP® BIOLOGY FREE-RESPONSE QUESTIONS (Form B)
Time—1 hour and 30 minutes
Directions: Answer all questions.
Answers must be in essay form. Outline form is not acceptable. Labeled diagrams may be used to supplement discussion, but in
no case will a diagram alone suffice. It is important that you read each question completely before you begin to write. Write all
your answers on the pages following the questions in the goldenrod booklet.
1. Prokaryotes are found throughout the biosphere. Answer two of the following.
a) Provide three examples of adaptations found in various prokaryotes. Explain how these three adaptations have ensured
the success of prokaryotes. b) Discuss how prokaryotes early in Earth’s history altered environments on Earth. c) Discuss three ways in which prokaryotes continue to have ecological impact today. 2. In most aquatic environments, primary production is affected by the light available to the community of organisms.
Using measurements of dissolved oxygen concentration to determine primary productivity, design a controlled experiment
to test the hypothesis that primary productivity is affected by either the intensity or the wavelength of light. In your answer,
be sure to include the following. •
• A statement of the specific hypothesis that you are testing
A description of your experimental design (Be sure to include a description of what data you would collect and how
you would present and analyze the data using a graph.)
A description of results that would support your hypothesis Copyright © 2004 by College Entrance Examination Board. All rights reserved.
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2 2004 AP® BIOLOGY FREE-RESPONSE QUESTIONS (Form B)
3. Homeostasis, maintaining a steady-state internal environment, is a characteristic of all living organisms. Choose three of the
following physiological parameters and for each, describe how homeostasis is maintained in an organism of your choice. Be
sure to indicate what animal you have chosen for each parameter. You may use the same animal or different animals for
your three descriptions. •
• Blood-glucose levels
pH of the blood
Osmotic concentration of the blood
Neuron resting-membrane potential 4. Organisms differ from one another and yet share common characteristics.
a) Select two kingdoms and briefly describe three characteristics used to distinguish between members of one kingdom
and members of the other. b) Describe three characteristics (at least one molecular and one cellular) that members of these two kingdoms share. c) Propose an explanation for the existence of similarities and differences between the two kingdoms. END OF EXAMINATION Copyright © 2004 by College Entrance Examination Board. All rights reserved.
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This note was uploaded on 11/23/2009 for the course BIOLOGY 1101 taught by Professor Keith during the Winter '05 term at The University of Oklahoma.
- Winter '05