#Question id: 13138
#Unit 10. Ecological Principles
#Question id: 13137
#Unit 10. Ecological Principles
#Question id: 13136
#Unit 10. Ecological Principles
The figure below illustrates the relationship between population density in the present generation (Nt) and population equilibrium density of this population 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?
#Question id: 13134
#Unit 10. Ecological Principles
Which of the graphs below represents the relationship between population size (N) and population growth rate (dN/dt) for a population showing exponential growth?
#Question id: 13133
#Unit 10. Ecological Principles
The diagram below 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?
#Question id: 13132
#Unit 10. Ecological Principles
Biologists performed an experiment with flies to examine the effects of population size on the maintenance of genetic variation and on egg-to-adult survival. From a large source population, they randomly assigned eggs to three experimental populations of size N, equal to 20, 60, and0100. For later generations, they collected N eggs from each population and moved them into identical vials that co0ntained f2re0sh me4d0ium. Th6e0y coun8te0d the number of adult flies that emerged and used tissue samples from the adults for genetic analyses. Genetic variation was measured by scoring alleles at several polymorphic loci and expressed as the average number of alleles at those loci. The results are summarized in Figure 1 and Figure 2 below.
Which other process appears to have substantially influenced the outcome of this experiment?