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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?
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- 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?What are the key factors that led to the changes in the birth rate and death rates as a country goes through the demographic transition? Describe in order that they occurred and how they affected the rates.In 2011, the city of Calgary had 1,096,833 people living within the city limits. Since then, there have been 245,678 births and 189,753 deaths. A total of 159,753 people moved to Calgary from other cities or countries, while only 12,354 people moved away from Calgary. How did the population of Calgary change since 2011? Express your answer using scientific notation in the form of x.yz x 10d people.
- “Calculate the rates specified below (a to c), using the following information about the black population of the United States in 2000 (numbers were modified to simplify calculations) “( be careful to use the correct denominator) Average population size 28 million, including 7.2 million women aged 15-44. There were 13 million men in this population. Live births: 600,000 Fetal deaths: 4380 Death in the first week of life: 6120 Death in the first 28 days of life (excluded first week): 960 Death in the first year of life (excluding in the first 28 days): 3900 Total deaths in the population: 230,000 Deaths from heart diseases: 75,000, of those 45,000 occurred among men aged 35 years and above What is the fetal mortality rate? What is post-neonatal mortality rate? What is the sex -specific mortality rate from heart diseaseThe graph shows the worldwide human population from 1950 to 2050. Data for the future years are predictions. According to the ideas of Thomas Malthus, what are the predicted changes to the human population after 2050? A. The population would continue to increase at the same rate, due to constant food supplies. B. The population would increase more rapidly, due to advances in technology. C. Eventually the population would stop increasing or would decrease, due to lack of food and living space. D. Eventually the population would decrease to zero, because of war, famine, or disease.You are studying a density - dependent turtle population that has the following relationships for the birth rate b’ and the death rate d’ as a function of population size (N) : b’ = 0.10 + 0.03 N - 0.0005 N ^2 d’ = 0.20 + 0.01 N Plot these functions in the same graph and discuss the population dynamics of the turtle. How does this model differ from the simple logistic model with linear birth and death functions?
- What are the two key concepts for this section? Listthree variables that affect the growth and decline ofhuman populations. How can we calculate the population change of an area? Define the total fertilityrate (TFR). How has the global TFR changed since1955? Summarize the story of population growth inthe United States. List six changes in lifestyles thathave taken place in the United States during the 20thcentury, leading to a rise in per capita resource use.The per capita birth (b) and death (d) rates are measured for two populations across a range of population sizes in the attached figure. The equation for exponential growth rate is dN/dt=rN where the per capita growth rate is r=(b-d). The equation for logistic population growth rate is dN/dt=rN(1-N/K). With logistic growth, r varies as a function of the population size with density-dependent birth and/or death rates. See attached image If the death rate decreased, what would happen to the population trajectory for population A? a) increase faster b) increase slower c) decrease faster d) decrease slowerThe chart below shows selected population data for twodifferent countries, A and B. Study the chart and answerthe questions that follow Calculate the rates of natural increase (due to birthsand deaths, not counting immigration) for the populations of country A and country B. Based on thesecalculations and the data in the table, for each of thecountries, suggest whether it is a more-developedcountry or a less-developed country and explain thereasons for your answers
- If the population of 150 squirrels at UofL has 15 births this year, what is the per capita birth rate? - 0.1 squirrels/yr/squirrel If the population of 150 squirrels at UofL has 10 deaths this year, what is per capita death rate? - 0.067 squirrels/yr/squirrel Calculate the intrinsic rate of increase for this squirrel population, using your answers to the questions above. - 0.03 squirrels/yr/squirrel Between having plenty of shelter in the trees and scavenging through the campus garbage, UofL squirrels have seemingly unlimited resources. Using the information you've calculated so far, determine the growth increment for the coming year for the UofL squirrel population. - 4.5 squirrels/yr Let's say that, after you calculated your predictions for unlimited growth of the UofL squirrel populations in the questions above, a bad storm comes through campus and wipes out half the trees! Now, the growth of the population of squirrels becomes limited. There are still 150 squirrels, but the…Why the world statistics on population is not reliable?Mention any four probable reasons for the rapid rise of population in our country?