Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 53, Problem 8TYU
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 emigration.
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Students have asked these similar questions
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.
Based on current growth rates, Earth’s human population in2019 will be closest to(A) 2.5 million.(B) 4.5 billion.(C) 7.5 billion.(D) 10.5 billion
1.) 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.
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_forwardYou 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. The correct answer is not displayed for Written Response type questions. Hide Feedback (A) Check geometric growth…arrow_forwardAnswer 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_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_forwardDuring 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 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/yeararrow_forward
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