Suppose there is no immigration and no emigration in this hypothetical population. When (1 - N/K) = 0, what does that imply about the birth rate (b) and death rate (d)? a. b > d b. b < d c. b = d d. It is not possible to make an inference about b and d based on this information.
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- Natality, mortality, immigration, and emigration are all terms related to any population. a) Describe briefly what each term means. b) Explain briefly how each process effects a population. c) Which of the terms do not relate to a closed population? Explain why not. d) Brainstorm several examples of closed populations that occur naturally. Contrast these with examples of closed populations produced by human intervention or other activities.For the following question, assume that the population that you are observing is in Hardy Weinberg Equilibrium (not evolving). If a population starts out with 7 Black Moths, 8 Grey Moths, and 30 White Moths, How many grey moths to you expect in the next generation if the population is 45? [grey] Round your answers to the nearest 1/100th (two decimal places)Some demographers claim that the total world population has already begun to slow, while others dispute this claim. How would you recognize a true demographic transition as opposed in mere random fluctuations in birth and death rates?
- Explain how to estimate the per capita rate of increase in a population. How would you estimate intrinsic rate of increase?Brown fur helps unicorns blend into their environment better than white fur. Therefore, brown furred unicorns are more likely to survive predators and hunters compared to white furred unicorns. If fur colour is a heritable trait, how would the population change over time? Describe how the proportion of individuals with brown versus white fur would change over time, if at all. What process is occurring in the population?Contrast exponential and logistic (= sigmoid) growth of a population. Under what conditions might you expect a population to exhibit ex-ponential growth? Why can exponential growth not be perpetuated indefinitely?
- If predicted genotypic frequencies do not match actual genotypic frequencies, what is true of the population? a It is changing. b It is in equilibrium. c The frequencies are unpredictable. d The sample population was too large.Figure (c) shows a population increasing in size under the influence of the relationships in (a) and (b). What do each arrow represent?A continuously growing population of alligators has a population size of 1,000 and an intrinsic rate of increase of r= 0.05 per year. Assuming that this rate of increase remains the same, about how long should it take for the population to reach 4000?
- Answer the following questions: Why do we usually express crude birth and death rates per thousand people? Why not give the numbers per person or for the entire population. Some demographers claim that the total world population has already begun to slow, while others dispute this claim. How would you recognize a true demographic transition as opposed in mere random fluctuations in birth and death rates?Suppose one population has an r that is twice as large as the r ofanother population. What is the maximum size that both populationswill reach over time, based on the exponential model?The frequency of a recessive allele in a population is 40%. What variable in the Hardy Weinberg equations does the 40% refer to? Why?
