Unformatted text preview: Name TA 45. How would the dispersion of humans in the United States best be described? A) dense
C) ra ndom
E) uniform 46. Natural selection involves energetic bade-offs between or among life history traits such as
A) number of offspring per reproductive episode.
B) number of reproductive episodes per lifetime.
C) age at ﬁrst reproduction.
D) A and C only
E) A. B. and C 47. in models of sigmoidal (logistic) population growth.
A) population growth rate slows dramatically as N approaches K.
B) new individuals are added to the population most rapidly at intermediate population sizes.
C) density—dependent factors affect the rate of population growth.
D) All of the above are true.
E) Only A and C are true. 48. Which of the following statements about human populations in developed countries is
A) Average family size is relatively small.
B) The population has undergone the demographic transition.
0) Life history is r-selected.
D) The survivorship curve is Type I.
E) Age distribution is relatively uniform. 49. All of the following describe possible results of competition between two species except
A) competitive exclusion.
B) aposematic coloration.
C) resource partitioning.
D) reduction in the population of one species.
E) reduction in the populations of both species. 50. Which of the following statements consenting the control of community stnicture is false?
A) A bottom—up community is controlled by nutrients.
B) A top-down community is controlied by predators.
C) increasing the biomass of vegetation in a bottomwup community will increase herbivores.
D) Increasing the biomass of vegetation in a bottom-up community will increase predators.
E) increasing the number of predators in a top-down community will decrease the biomass of vegetation. 51. in conservation biology. species-area curves for key taxa make it possible to predict
A) the size of an area that needs to be sampled.
B) the area that a keystone species will occupy.
C) whether or not a redundancy model will apply to a given area.
D) how the loss of a certain habitat area is likely to affect biodiversity.
E) whether or not an area will reach equilibrium. Total nnints this nane ...
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- Fall '07