2 2003 ap biology free response questions critical

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Unformatted text preview: ON TO THE NEXT PAGE. 2 2003 AP® BIOLOGY FREE-RESPONSE QUESTIONS Critical Values of the Chi-Squared Distribution Degrees of Freedom (df) Probability (p) 1 3.84 0.05 2 5.99 3 7.82 The formula for Chi-squared is: X 2=Ê 4 9.49 5 11.1  (o - e)2 "# !e$ where o = observed number of individuals e = expected number of individuals ∑= the sum of the values (in this case, the differences, squared, divided by the number expected) 2. Regulatory (control) mechanisms in organisms are necessary for survival. Choose THREE of the following examples and explain how each is regulated. (i) Flowering in plants (ii) Water balance in plants (iii) Water balance in terrestrial vertebrates (iv) Body temperature in terrestrial vertebrates Copyright © 2003 by College Entrance Examination Board. All rights reserved. Available to AP professionals at apcentral.collegeboard.com and to students and parents at www.collegeboard.com/apstudents. GO ON TO THE NEXT PAGE. 3 2003 AP® BIOLOGY FREE-RESPONSE QUESTIONS 3. Many populations exhibit the following growth curve: (a) Describe what is occurring in the...
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