Which of the following scenarios best exemplifies the bottleneck effect? Group of answer choices 1. A small group of individuals leaves their tribe to form a new civilization. 2. A natural disaster drastically reduces the population. 3. An entire population from North America migrates down to South America. 4. Minions with larger eyes have greater fitness in the population.

Which of the following scenarios best exemplifies the bottleneck effect? Group of answer choices 1. A small group of individuals leaves their tribe to form a new civilization. 2. A natural disaster drastically reduces the population. 3. An entire population from North America migrates down to South America. 4. Minions with larger eyes have greater fitness in the population.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter45: Population And Community Ecology

Section: Chapter Questions

Problem 5RQ: Which of the following is best at showing the life expectancy of an individual within a population?...

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3.Brainstorm a list of factors, events, or conditions that might affect the growth of human populations in these countries. Predict the effect of each factor on the population growth rate. 4.As a group, make a list of factors or groups of factors that have the greatest impact on population growth. Justify your answers.
Figure 45.2 As this graph shows, population density typically decreases with increasing body size. Why do you think this is the case?
Humans have which type of survivorship curve? Type I Type II Type III Type IV
Figure 45.16 Age structure diagrams for rapidly growing, slow growing, and stable populations are shown in stages 1 through 3. What type of population change do you think stage 4 represents?
Which of the following is best at showing the life expectancy of an individual within a population? quadrat mark and recapture survivorship curve life table
One reason why human populations have been able to sidestep the factors that usually control population growth is that: a. the carrying capacity for humans has remained constant sincehumans first evolved. b. agriculture and industrialization have increased the carryingcapacity for our species. c. the population growth rate (r) for the human population hasalways been small. d. the age structure of human populations has no impact on itspopulation growth. e. plagues have killed off large numbers of humans at certaintimes in the past.
Base your anSwers to questlons 7 and 8 on the graph below and the growth of a population of rabbits in a specific ecosystem. Rabbit Population in a Specific Ecosystem Time 7. Which environmental factor could have caused the change indicate increased predation by herbivores Population Size
APPLY YOUR KNOWLEDGE Human populations are subiect to the same population control factors in the environment that mipact natural populations. For example, during the 14th century, the bubonic plague killed approximately one- third of the human population. A. Is the bubonic plague an example of a dènsity-dependent or density-independent factor? Explain. B. Two-thirds of the population survived the bubonic plague, even though many of the survivors were most likely bitten by disease-carrying fleas. In terms of evolution, explain how it was possible to be a survivor. C. Discuss two ways that humans have increased the carrying capacity of their population.
1. Figure r shows the variation in height of a sample of men in a population. 4500 4000 3500 3000 2500 2000 Ž 1500 1000 500 157 159 161 163 165 167 169 171 173 175 177 179 181 183 185 187 189 191 193 Height (cm) Figure 1. Height of a sample of men in a population hp Number of men
A population of 30 rabbits has been introduced into a new region. It is estimated that the maximum population the region can sustain is 400 rabbits. After 1 year, the population is estimated to be 90 rabbits. How many rabbits will there be after 3 years? In a city whose population is 100 000 an outbreak of flu occurs. When the city health department begins, its record keeping, there are 625 infected people. The number of infected people N is increasing at a rate proportional to the square root number of infected people at time t in weeks. One week later, there are 1600 infected people. Find the number of infected people two weeks after the record keeping begins.
6. What does the y-axis represent? 7. Exit the "How to Use" page by clicking on the x button on the top right. Move the growth rate r slider to its lowest value of 0.1, then gradually increase it. What happens to the population size as you increase the growth rate? 8. Now place the growth rate at r= 0.5. (You can do this by adjusting the slider, or you can type in the value in the box next to the r=" label and hit return.) Describe how the population growth varies if it starts from a small initial value (N, = 5 individuals) versus a larger initial value (N, = 100 individuals)? Change the "N" values accordingly to run each simulation. 9. Keep the growth rate at r= 0.5, and set N = 1000 individuals. What is N when t= 6? To answer this question, you can type the new value of " into the dialog box. Then, rescale the graph so that you can see the higher values of N: Click on the gear icon and change the Max value of Pop.(N.) to 25,000. N= For #10-12, match the parameters with the type of…
5. In 2001, a total of 15,555 homicide deaths occurred among males and 4,753 homicide deaths occurred among females. The estimated 2001 midyear populations for males and females were 139,813,000 and 144,984,000, respectively 1. Calculate the homicide-related death rates for males and for females 2. What type(s) of mortality rates did you calculate in Question 1? 3. Calculate the ratio of homicide- mortality rates for males compared to females. 4. Interpret the rate you calculated in Question 3 as if you were presenting information to a policymaker