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Unformatted text preview: ggers) ovulation • Continuation of meiosis OR completion of meiosis 1 OR discuss negative feedback, FSH/estrogen How process is disrupted • Decrease in FSH: sterile, no possibility of fertilization/pregnancy—no ovulation • Increase in FSH: multiple eggs develop, multiple births © 2008 The College Board. All rights reserved. Visit the College Board on the Web: www.collegeboard.com. AP® BIOLOGY 2008 SCORING GUIDELINES
Question 3 (continued)
Prey Population Dynamics/Predators Role of regulator • Predator decreases (consumes, eats, etc.) prey population in size/number • Negative feedback discussion: graph/lag elaboration, cyclic fluctuation or equilibrium leads to stabilizing size or carrying capacity How process is disrupted • Decrease in predators: prey population increases, exceeds carrying capacity, increased competition for resources—decrease in prey • Increase in predators: prey population decreases, boom/bust as result of more prey being captured/eaten causing decrease in prey population; may cause predator decrease due to lack of food Ecological Succession/Fire Role of regulator • Triggers/sets stage for succession; OR maintains a stable community • Returns/releases nutrients into soil; OR triggers germination in some plant species; OR changes community makeup, allows for pioneer species, eliminates some species How process is disrupted • Decrease in fire: leads to invasive species opportunity, lack of nutrient recycling, leads to detritus build...
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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