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Unformatted text preview: ntial prey to avoid predation EXCEPT (A) (B) (C) (D) (E) mimetic coloration erratic flight cryptic coloration lekking alarm signals 92. The graph above illustrates a simplified description of the effect of disturbance on species diversity. Which of the following best explains the graph? (A) Productivity is enhanced at intermediate levels of disturbance. (B) Stabilizing selection occurs at intermediate levels of disturbance. (C) The interaction of physical factors and biological competition increases diversity at intermediate levels of disturbance. (D) Directional selection is enhanced by increased disturbance. (E) Food chains are disrupted at high and low levels of disturbance. 93. Plants having C4 metabolism are common in all of the following regions EXCEPT (A) (B) (C) (D) (E) taiga warm deserts tropical grasslands tropical agricultural areas deserts with limited trace elements 91. The amount of genotypic variation in a natural population can be increased by all of the following EXCEPT (A) (B) (C) (D) (E) mutation recombination immigration hybridization inbreeding GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 29 94. The graphs above show that the relationship between atmospheric CO2 and mean global temperature is (A) (B) (C) (D) (E) a positive correlation an inverse relationship a cause-and-effect relationship evidence of an impending ice age no relationship at all 95. Which of the following is NOT a hypothesis explaining the advantage of group living? (A) (B) (C) (D) (E) Vigilance effect Dilution effect Group foraging Group defense Parasite avoidance GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 30 96. The graphs above show the survivorship and fecundity curves for two congeneric species, X and Y, that are found in different habitats. Of the two species, Y is more likely to (A) (B) (C) (D) (E) come from a disturbed habitat in early succession have a longer generation time have a lower fecundity have a longer life span have low dispersal ability GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 31 97. If average family size for the human population could be immediately reduced to two children per couple, the population would (A) (B) (C) (D) (E) remain constant begin an immediate decline continue to increase for 20 to 40 years continue to increase indefinitely crash within 5 years 99. Reproductive value (Vx ) calculated from population life-table data provides a measure of the (A) contribution of an individual of age x to the future growth of the population relative to a newborn’s contribution (B) average number of offspring produced by a female during age interval x (C) proportion of available resources allocated to reproduction in individuals in population x (D) probability of offspring surviving to age class x (E) intrinsic growth rate of the population 100. Life-history characteristics associated with K-selected orga...
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This document was uploaded on 03/16/2014 for the course BIO 1434 at UT Arlington.
- Spring '14