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Unformatted text preview: E) Species Species Species Species Species A A B B C and and and and and B C D E D 165. Of the species studied, which has the highest basal metabolic rate? (A) (B) (C) (D) (E) Species Species Species Species Species A B C D E GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 49 Questions 168-171 The graph below shows the growth rates of populations of bacteria that have evolved for many generations at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 50 168. Which of the following is true concerning the thermal dependence of growth rate between 25°C and 30°C in these populations? (A) Thermal dependence is greatest in the population evolved at 25°C. (B) Thermal dependence is greatest in the population evolved at 30°C. (C) Thermal dependence is greatest in the population evolved at 35°C. (D) Growth rates of all populations are equally thermally dependent over this temperature range. (E) Growth rates of all populations are thermally independent over this temperature range. 169. Which population has the highest fitness at 25°C ? The population evolved at 25°C. The population evolved at 30°C. The population evolved at 35°C. All populations are equally fit at this temperature. (E) It cannot be determined from the information given. (A) (B) (C) (D) 170. Which of the following can be correctly concluded from this experiment? (A) The temperature range of the thermal niche remains constant at different evolutionary temperatures, even though critical thermal limits may change. (B) Critical thermal limits remain constant during evolution at different temperatures. (C) The same maximal growth rate is attained in all three populations, but it is attained at different temperatures. (D) Maximal growth rate is not always attained at the temperature at which a population evolved. (E) No evolutionary changes have occurred in these populations. 171. If all three populations were mixed together and placed at 37°C, which of the following would be most likely to happen? (A) Only the population evolved at 25°C would die and become extinct. (B) Only the population evolved at 35°C would survive and reproduce. (C) All the bacteria would die and the populations would become extinct. (D) All populations would grow, and transfer of genes would create one common population. (E) It cannot be determined from the information given. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 51 Questions 172-174 refer to the following experiment. The graph below contains data obtained in an experiment designed to elu...
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This document was uploaded on 03/16/2014 for the course BIO 1434 at UT Arlington.
- Spring '14