EP CONNECT ONLINE ACCESS FOR BIOLOGY
20th Edition
ISBN: 9781260494655
Author: Raven
Publisher: MCG COURSE
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Chapter 54, Problem 6DA
Summary Introduction
To determine: The rate of population increase after 10 generations in mouse species.
Introduction: Horizontal gene transfer can be defined as the exchange of genetic contents between the unicellular and multi-cellular organisms that do not include the transmission of DNA from parent to offspring. This process is responsible for evolution by mixing the genetic material of two species.
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(b) Suppose that we want to model the evolution of the population of a cer-
tain type of organisms. Observations indicate that if the population drops
below a survival level of 10° individuals, it goes extinct. Moreover, the
population growth is limited: the available resources of space and food
can sustain at most 106 individuals. We treat the population size P(t) as
a continuous function of time.
(i) Explain briefly how the following model incorporates the above ob-
servations:
dP
— К(А- Р)(Р — В), k>0,
dt
where P(t) denotes the population size at time t and B 0.
dt
Find the equilibrium values and determine their stability.
[6]
2, 4, 5 and 6
EVOLUTION ASSESSMENT - FINCHES
Galápagos Ground Finches
Between 1973 and 1978, the population of ground finches (a type of small bird) on the Galápagos Islands
decreased. Scientists made observations of the population throughout that time period. They recorded
and graphed differences in the distribution of traits over time. The two sets of graphs below come from
the data they collected.
Beak Length for Ground Finches Observed in the Wet Seasons of 1973 and 1978
Wet 1973: all finches
# of finches
30
# of finches
25
20
15
10
5
0
30
25
20
15
10
5
12-01
0
$4.9
80-84
30.0-
11.5-11.9
Beak Length (mm)
Source: inquiryHub
35.0-39.9
40.0-44.9
12.5-12.9
13.0-13.4
13.5-13.9
14.0-
Wing Length for Ground Finches Observed in the Wet Seasons of 1973 and 1978
Wet 1973: all finches
65.0
Wing Length (mm)
Source: inquiryHub
70.0-74.9
# of finches
75.0-
30
25
# of finches
20
10
5
0
30
25
20
15
O
10
5
0
Wet 1978: all finches
7.0-74
7.5-7.9
80-8.4
85-80
9.0-94
9.5-9.9
10.0-1
30.0-34.9
10.5-10.9
11.0-11.4…
Chapter 54 Solutions
EP CONNECT ONLINE ACCESS FOR BIOLOGY
Ch. 54.1 - Prob. 1LOCh. 54.1 - Prob. 2LOCh. 54.1 - Explain how species adapt to environmental...Ch. 54.2 - Prob. 1LOCh. 54.2 - Prob. 2LOCh. 54.3 - Prob. 1LOCh. 54.3 - Prob. 2LOCh. 54.3 - Prob. 3LOCh. 54.4 - Prob. 1LOCh. 54.4 - Prob. 2LO
Ch. 54.5 - Prob. 1LOCh. 54.5 - Discuss why populations cannot grow exponentially...Ch. 54.5 - Define carrying capacity and explain what might...Ch. 54.6 - Prob. 1LOCh. 54.6 - Prob. 2LOCh. 54.6 - Prob. 3LOCh. 54.7 - Prob. 1LOCh. 54.7 - Prob. 2LOCh. 54.7 - Prob. 3LOCh. 54 - Prob. 1DACh. 54 - Prob. 2DACh. 54 - Prob. 3DACh. 54 - Prob. 4DACh. 54 - Prob. 5DACh. 54 - Prob. 6DACh. 54 - Prob. 1IQCh. 54 - Prob. 2IQCh. 54 - Prob. 3IQCh. 54 - Prob. 4IQCh. 54 - Prob. 5IQCh. 54 - Prob. 6IQCh. 54 - Prob. 7IQCh. 54 - Prob. 8IQCh. 54 - Suppose experimenters artificially kept the hare...Ch. 54 - Prob. 10IQCh. 54 - Prob. 11IQCh. 54 - Prob. 12IQCh. 54 - Source-sink metapopulations are distinct from...Ch. 54 - The potential for social interactions among...Ch. 54 - When ecologists talk about the cost of...Ch. 54 - Prob. 4UCh. 54 - The difference between exponential and logistic...Ch. 54 - Prob. 6UCh. 54 - Which of the following is an example of a...Ch. 54 - If the size of a population is reduced due to a...Ch. 54 - In populations subjected to high levels of...Ch. 54 - In a population in which individuals are uniformly...Ch. 54 - Prob. 4ACh. 54 - Refer to figure 55.8. What are the implications...Ch. 54 - Prob. 2SCh. 54 - Refer to figure 55.14. Because the number of...Ch. 54 - Refer to figure 55.26. Would increasing the mean...
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