Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 53, Problem 5TYU
Based on current growth rates, Earth's human population 2019 will be closest to
- (A) 2.5 million.
- (B) 4.5 billion.
- (C) 7.5 billion.
- (D) 10.5 billion.
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You monitor the white-tailed deer population for the Wright State campus and woods and estimate 14 deer in the first year and 21 deer
in the second year.
(A) Assume the deer population is growing geometrically. Based on these data, what is geometric growth rate constant (A)?
(B) Geometric growth patterns can also be modeled exponentially. If modeled exponentially, would you expect the exponential growth
rate constant () to be greater than, less than, or equal to 0? Why?
You monitor the deer population for many years. The population grows for a few more years, then seems to stabilize around 75 deer.
(C) Given this information, what would be a more appropriate model for the deer population growth? Why?
(D) What factors might be limiting the population growth? Would these factors be considered density-dependent or density-
independent factors? Why?
it is equal to zero.
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(A) Check geometric growth…
A human population of 10,000 individuals has a birth rate of 90 per every 1000 persons and a death rate of 16 per every 1000 individuals. Calculate the yearly increase of the population growth.
a) 740 individuals/year
b) 74 individuals/year
c) 10,074 individuals/year
d) 11,074 individuals/year
A population’s carrying capacity(A) may change as environmental conditions change.(B) can be accurately calculated using the logistic growth model.(C) increases as the per capita population growth rate decreases.(D) can never be exceeded.
Chapter 53 Solutions
Campbell Biology
Ch. 53.1 - DRAW IT Each female of a particular fish species...Ch. 53.1 - Prob. 2CCCh. 53.1 - Prob. 3CCCh. 53.2 - Explain why a constant per capita rate of growth...Ch. 53.2 - Prob. 2CCCh. 53.2 - Prob. 3CCCh. 53.3 - Explain why a population that fits the logistic...Ch. 53.3 - WHAT IF? Given the latitudinal differences in...Ch. 53.3 - Prob. 3CCCh. 53.4 - Identify three key life history traits, and give...
Ch. 53.4 - Prob. 2CCCh. 53.4 - Prob. 3CCCh. 53.5 - Prob. 1CCCh. 53.5 - Prob. 2CCCh. 53.5 - WHAT IF? Suppose you were studying a species that...Ch. 53.5 - Prob. 4CCCh. 53.6 - How does a human population's age structure affect...Ch. 53.6 - How have the rate and number of people added to...Ch. 53.6 - WHAT IF? Type "personal ecological footprint...Ch. 53 - Gray whales (Eschrichtius robustus) gather each...Ch. 53 - Suppose one population has an r that is twice as...Ch. 53 - Prob. 53.3CRCh. 53 - Prob. 53.4CRCh. 53 - Density-dependent factors regulate population...Ch. 53 - The human population is no longer growing...Ch. 53 - Population ecologists follow the fate of same-age...Ch. 53 - A population's carrying capacity (A) may change as...Ch. 53 - Scientific study of the population cycles of the...Ch. 53 - Analyzing ecological footprints reveals that (A)...Ch. 53 - Based on current growth rates, Earth's human...Ch. 53 - The observation that members of a population are...Ch. 53 - According to the logistic growth equation...Ch. 53 - During exponential growth, a population always (A)...Ch. 53 - Prob. 9TYUCh. 53 - Prob. 10TYUCh. 53 - EVOLUTION CONNECTION Contrast the selective...Ch. 53 - Prob. 12TYUCh. 53 - Prob. 13TYUCh. 53 - WRITE ABOUT A THEME: INTERACTIONS In a short essay...Ch. 53 - SYNTHESIZE YOUR KNOWLEDGE Locusts (grasshoppers in...
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- Which of the following statements about human populationsin industrialized countries is incorrect?(A) Birth rates and death rates are high.(B) Average family size is relatively small.(C) The population has undergone the demographictransition.(D) The survivorship curve is Type Iarrow_forward(8) One of the main factors cited for our "spectacular population growth" is (a) larger living spaces for members of the population (b) better opportunities for educational advancement (c) reduced carbon dioxide emissions (d) increased agricultural outputarrow_forward1.) At approximately what year did the human population enter an exponential growth phase? 2.) Prior to that time, what was the approximate carrying capacity of Earth? 3.) State three significant technological developments that have acted to increase the carrying capacity of Earth’s environment since that time. 4.) Provide two examples of density-dependent factors that are contributing to or have the potential to contribute to environmental resistance in human populations.arrow_forward
- During exponential growth, a population always(A) has a constant per capita population growth rate.(B) quickly reaches its carrying capacity.(C) cycles through time.(D) loses some individuals to emigrationarrow_forwardA highly developed country has a (a) long doubling time (b) low infant mortality rate (c) high GNI PPP per capita (d) a and b (e) a, b, and carrow_forwardThe global human population has surpassed 7 billion, far exceeding our population’s size throughout our history on Earth. Name some specific means by which we have apparently raised Earth’s carrying capacity for our species. Do you think we can continue to raise our carrying capacity? How might we do so? What limiting factors exist for the human population today? Might Earth’s future carrying capacity for us decrease? Why or why not?arrow_forward
- During what phase of the growth curves in each diagram is the population just beginning to colonize an area? (C) a) Which type of population growth appears to continue unchecked? b) The growth curves in the Model are often referred to using the letters of the alphabet they resemble. The logistic growth curve is sometimes referred to as an S-curve. What letter would you use to describe the exponential growth curve? c) What causes the population to slow down during logistic growth? d) The maximum population an environment can sustain is affected by environmental factors that cause the population to level out or become stable. What term is used to describe this level of logistic growth? Diagram A-Exponential Growth Curve Population Numbers Exponential growth Lag phase Time Population Numbers Diagram B-Logistic Growth Curve Lag phase Time Carrying capacity (K) Pressure begins due to environmental resistancearrow_forwardA population of 265 swans are introduced into Hudson Bay. The population's birth rate is 0.341 swans/year per capita, and the death rate is 0.296 swans/year per capita. What is the rate of population growth per capita, and is it increasing or decreasing? (Check 2 answers) a) increasing b) decreasing c) 0.045 d) 0.055 e) 0.637arrow_forwardPart B) Paul Ehrlich prediction the carrying capacity of the global human population to be around 5.8 billion people. This is an: a)underestimation of the actual carrying capacityb)overestimationC)He was exactly right Part c) Amazingly, a water bear -microscopic invertebrates- can adjust its metabolism to zero and “hibernate” when the habitat dries. Then, presto-add water and it springs back to life. This is an example of ___ to a ____stress.a. acclimation, temperatureb acclimation, waterc adaptation, energyd adaptation, nutrientsPart D) The long-leaf pine forest ecosystem once extended across 95 million acres of the southeastern US. However only 5 million acres now remain. This refers to a large reduction ina. the species rangeb a metapopulationc a mega populationarrow_forward
- Answer these questions A) A population of 25 animals is growing exponentially, and the population has a growth rate of 0.7. How big would the population be after 5 years? B) What's the difference between exponential and logistic growth?arrow_forwardThree characteristics of a population are the birth rate, growth rate, and death rate. How has each been affected by (a) modern medicine, (b) modern agriculture, and (c) modern industryarrow_forwardHow would you describe human population growth for the past 200 years. When determining Earth’s carrying capacity for humans, why is it not enough to just consider human numbers? What will happen if there is a rapid growth in human population? What solutions do you have in mind to limit the human population growth?arrow_forward
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