ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
3rd Edition
ISBN: 9780135964422
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 40, Problem 4TYU
According to the
- A. the number of individuals added per unit time is greatest when N is close to zero.
- B. the per capita growth rate increases as N approaches K.
- C. population growth is zero when N equals K.
- D. the population grows exponentially when K is small.
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dN/dt= rmaxN [(K – N)/K] represents:a.annual growth rate.b.geometric population growth.c.exponential growth rate.d.logistic growth.e.none of the choices apply.
Use this graph of the idealized exponential and logistic growth curves to complete the following. a. Label the axes and curves on the graph.b. What does the dotted line represent? c. For each curve, indicate and explain where population growth is the most rapid. d. Which of these curves better represents global human population growth?
Nt= N0 t represents:a.geometric population growth.b.annual growth rate.c.exponential growth rate.d.logistic growth.e.none of the choices apply.
Chapter 40 Solutions
ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
Ch. 40.1 - Explain how the suns unequal heating of Earths...Ch. 40.1 - Prob. 2CCCh. 40.1 - WHAT IF? If global warming increases average...Ch. 40.2 - Why are phytoplankton and not benthic algae or...Ch. 40.2 - Prob. 2CCCh. 40.2 - MAKE CONNECTIONS The addition of nutrients to a...Ch. 40.3 - Give examples of human actions that could expand a...Ch. 40.3 - WHAT IF? You suspect that deer are restricting the...Ch. 40.4 - DRAW IT Each female of a particular fish species...Ch. 40.4 - Imagine that you are constructing a life table for...
Ch. 40.4 - Prob. 3CCCh. 40.5 - Explain why a constant per capita rate of growth...Ch. 40.5 - Explain why a population that fits the logistic...Ch. 40.5 - Prob. 3CCCh. 40.6 - Prob. 1CCCh. 40.6 - WHAT IF? Mice that experience stress such as a...Ch. 40.6 - Prob. 3CCCh. 40 - Which of the following biomes is correctly paired...Ch. 40 - A populations carrying capacity A. may change as...Ch. 40 - When climbing a mountain, we can observe...Ch. 40 - According to the logistic growth equation...Ch. 40 - WHAT IF? If the direction of Earths rotation...Ch. 40 - INTERPRET THE DATA After examining Figure 40.13,...Ch. 40 - SCIENTIFIC INQUIRY Jens Clausen and colleagues, at...Ch. 40 - Prob. 8TYUCh. 40 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 40 - Prob. 10TYU
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- A population that grew in close relation to the amount of resources available in the environment, would experience A. exponential growth, such as shown on the J-shaped curve B. logistic growth, such as shown on the S-shaped curve C. unpredictable growth, such as shown on the ?-shaped curve D.logistic growth, such as shown on the J-shaped curve E. exponential growth, such as shown on the S-shaped curvearrow_forwardThe population of individuals is growing at a continuous rate. The maximum growth rate is 0.35 and the carrying capacity of the population is 800 individuals. a. If the population size is 20 individuals, find the population growth rate. Show your work. b. If the population was nearing the carrying capacity, how would this rate compare to the calculated rate in part a? A calculation is not required.arrow_forwardHow does the logistic growth model of population growth differ from the exponential growth model? A. The graph of the exponential model is S-shaped. B. The logistic growth model shows an unrestricted growth rate. C. The logistic growth model considers the environment's carrying capacity. D. The exponential growth model shows a restricted growth rate.arrow_forward
- Population growth that adds the same number each year A. Arithmetic Growth B. Carrying Capacity C. Intrinsic Rate of Growth D. Exponential Growtharrow_forwardA population that did not grow in close relation to the amount of resources available in the environment, and dramatically overshot the carrying capacity, would experience: A. logistic growth, such as shown on the S-shaped curve B. exponential growth, such as shown on the J-shaped curve C. unpredictable growth, such as shown on the ?-shaped curve D. exponential growth, such as shown on the S-shaped curve E.logistic growth, such as shown on the J-shaped curvearrow_forwardPopulation growth that is dependent on the number of individuals A. Arithmetic Growth B. Carrying Capacity C. Intrinsic Rate of Growth D. Exponential Growtharrow_forward
- Show how you build the logistic model for population growth from the exponential model equation? What part of the logistic growth equation produces the sigmoidal growth curve?arrow_forwardWhen does the growth rate of a population following the logistic model equal zero?the logistic model is given as dN/dt = rN (1-N/K)arrow_forwardWrite a generalized model for exponential population growth. Define your terms. Then, draw a plot showing an example, being sure to label your axes. Write a formula that extends the preceding model to incorporate carrying capacity, producing sigmoidal population growth. Define your terms. Then, draw a plot showing an example, being sure to label your axes.arrow_forward
- Draw a graph with a growth curve for a population that starts at 10 individuals and experiences exponential growth. Draw a second graph with a growth curve for a population that starts with 10 individuals and undergoes logistic growth. The second graph should have a carrying capacity of 100 individuals. Please give a proper written explanation for the graphs.arrow_forwardansweIS a aIc auove Best estimate 26. The graph at the right shows three UN scenarios of future human population growth (in billions). Which of the following most accurately describes this graph? a. We will reach carrying capacity before 2050. b. Two of three scenarios assume population growth rate High projection Low projection in 2050 will be less than in 1970. c. Annual growth rate has been declining since - 1970. d. Current and future growth rates have little influence on future population size. e. Population scientists cannot make reliable population predictions for a population that has barely been studied: more research needs to be conducted. 2 1950 1960 1970 1980 1990 2000 2010 2020 2030 2040 2050 Year Figure 1. United Nations World Population Projections, 1950-2050 Human population size (billions)arrow_forwardThe growth rate of a population per unit of time is calculated by using this formula: G = r x N. What is the quantity r and how is it calculated?arrow_forward
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