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Unformatted text preview: AP® Biology
2006 Free-Response Questions
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AP Central is the official online home for the AP Program: apcentral.collegeboard.com. 2006 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. Sexual reproduction requires that half of the chromosomes in a zygote come from one parent and the other half
from the second parent.
(a) Describe the process by which a germ cell’s complement of chromosomes is halved in the formation of
(b) Choose one organism or group of organisms that reproduce asexually. Describe the mode of asexual
reproduction in that organism and explain the advantages to the organism of asexual reproduction.
(c) Choose one organism or group of organisms that reproduce sexually. Describe the mode of sexual
reproduction in that organism and explain the advantages to the organism of sexual reproduction. 2. The relationship of structure to function is one of the major themes in biology. For three of the following
structure/function pairs, describe the structure and then explain how the function is related to the structure.
(a) Enzyme structure/catalysis
(b) mRNA structure/protein synthesis
(c) Cell membrane structure/signal transduction
(d) Membrane protein structure/active transport or facilitated diffusion © 2006 The College Board. All rights reserved.
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2 2006 AP® BIOLOGY FREE-RESPONSE QUESTIONS (Form B) 3. While studying transpiration, a scientist used a dendrometer to record the small daily changes in the diameter of
a tree trunk at two different heights (2 meters and 3 meters) above the ground at the same time. The diameter
decreased in the daytime. This decrease happened first at the higher location. Discuss the following in relation to
water movement in plants.
(a) Identify how two different environmental factors could be involved in the daily fluctuations shown above.
(b) Discuss the mechanisms involved in the uptake and transport of water by vascular plants.
(c) Discuss the role of water in the normal functioning of plants. 4. In many ways, all organisms in a food web can be said to be solar-powered. The producer level of the food web
is responsible for the transformation of the solar energy into a form that can be used by other living organisms.
(a) Discuss the role of green plants in transforming the Sun’s energy into a form that can ultimately be used by
(b) Discuss the flow of energy from producers through top carnivores in a food web in terms of the laws of
END OF EXAM © 2006 The College 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