practice_book_biology

Life history characteristics associated with k

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Unformatted text preview: nisms include (A) rapid reproductive rates, short generation times, and large body size (B) repeated reproduction, few progeny, and large body size (C) inhabiting early successional state communities, rapid maturation rates, and numerous large offspring (D) inhabiting climax communities, many small offspring, and short life span (E) poor competitive ability, rapid maturation rates, and short life span 98. The figure above illustrates the relationship between population density in the present generation (Nt ) and population density in the next generation (Nt+1 ). The dashed reference line has a slope of 1. Which of the following represents equilibrium density of this population? (A) (B) (C) (D) (E) I II III IV There is no equilibrium. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 32 dN dt rN K K N 101. The logistic equation above is used to describe the rate of change of a population, N, with time, t, where r is the intrinsic rate of increase and K is the carrying capacity. Which of the following statements is true for this equation? (A) (B) (C) (D) (E) For a given population, r is variable. For a given environment, K is variable. As N approaches K, dN/dt approaches 0. As N approaches K, dN/dt approaches K. As N approaches K, dN/dt approaches r. 104. The diagram above depicts three general types of survivorship curves. Only the form of the curve is important, not its absolute scale. Which of the following statements is LEAST likely to be true? (A) Nearly constant mortality results in a Type II curve. (B) A fish that lays vast numbers of eggs exhibits a Type III curve. (C) Mortality that is initially low, then increases rapidly during old age, results in a Type I curve. (D) Currently, human populations in the United States and Europe generally exhibit a Type I curve. (E) A species with high juvenile mortality and high adult survivorship results in a Type I curve. 105. All of the following may be considered as sites for secondary succession EXCEPT (A) (B) (C) (D) (E) an abandoned agricultural field a bare rock shelf on a mountainside a forest gap resulting from a tree fall a hurricane-damaged forest a flooded valley 102. Which of the following biomes is characterized by a wet, mild winter and a warm, dry summer? (A) (B) (C) (D) (E) Taiga Tundra Chaparral Tropical rain forest Temperate deciduous forest 103. If a species is a keystone predator, then its removal from a community should (A) decrease population size of the predator’s preferred prey (B) decrease species diversity in the prey community (C) decrease productivity of the predator’s preferred prey (D) increase species diversity in the prey community (E) increase the number of trophic levels GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 33 106. The figure above shows the distribution of 10 plant species that grow along a regular environmental gradient, such as depth of the water table in a river valley. All other environmental factors are similar. This figure demonstrates...
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This document was uploaded on 03/16/2014 for the course BIO 1434 at UT Arlington.

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