Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 52, Problem 13TYK
Discuss Concepts Many city-dwellers have noted that the density of cockroaches in apartment kitchens appears to vary with the habits of the occupants: people who wrap food carefully and clean their kitchen frequently tend to have fewer arthropod roommates than those who leave food on kitchen counters and clean less often. Interpret these observations from the viewpoint of a population ecologist.
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Consider the following scenario and respond to the question below.
A population of bird exists with variation in beak size, from small to medium to large beaks. This population experiences a shift in climate that affects food supply. Previously, the birds consumed insects, which was a diet perfectly suited to medium-sized beaks. Insects are less available following the change in climate. Now, fruits and seeds are the abundant food type. These are most successfully acquired by large beaks (for fruits) and small beaks (for seeds).
Which best explains the expected role of natural selection in this scenario?
Group of answer choices
The entire bird population (of all beak sizes) will go extinct.
Birds in this population with larger and smaller beaks will have higher reproductive fitness than birds with medium-sized beaks based on ability to acquire sufficient food.
Birds with medium-sized beaks will undergo change in their lifetime to either shrink or grow their beak size to adapt.…
Given your understanding of life histories and population dynamics, propose some ideas for how different types of organisms might respond (in terms of population dynamics) to these different conditions: climate change, land-use change, and pollution that are eliminating and transforming habitats worldwide.
Consider the evolution of the population of a species of small rodents. Assume that the number of males and females are nearly equal. Due to statistical data one can assume that each female remains a juvenile for one year and then becomes an adult, and that only adults have offspring. The reproduction rate is 2. The adult surviving rate is α. The juvenile surviving rate is 2/5. Initially the population counted 100 females and 40 juveniles. What values of the adult surviving rate will ensure that the population stabilize?
Chapter 52 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 52.1 - Prob. 1SBCh. 52.1 - Prob. 2SBCh. 52.2 - Prob. 1SBCh. 52.2 - Prob. 2SBCh. 52.3 - To what two broad categories of activities do...Ch. 52.3 - Why do fecundity and the amount of parental care...Ch. 52.4 - How does the prediction of the exponential model...Ch. 52.4 - Prob. 2SBCh. 52.4 - Prob. 3SBCh. 52.5 - Prob. 1SB
Ch. 52.5 - Prob. 2SBCh. 52.6 - Prob. 1SBCh. 52.6 - Prob. 2SBCh. 52 - Prob. 1TYKCh. 52 - Prob. 2TYKCh. 52 - Prob. 3TYKCh. 52 - The model of exponential population growth...Ch. 52 - Prob. 5TYKCh. 52 - One reason why human populations have been able to...Ch. 52 - Prob. 7TYKCh. 52 - A population of 1,000 individuals experiences 462...Ch. 52 - Prob. 9TYKCh. 52 - Prob. 10TYKCh. 52 - Prob. 11TYKCh. 52 - Prob. 12TYKCh. 52 - Discuss Concepts Many city-dwellers have noted...Ch. 52 - Prob. 15TYKCh. 52 - Prob. 1ITD
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