BIOLOGY 12E CONNECT ACCESS CARD
12th Edition
ISBN: 9781264938513
Author: Raven
Publisher: MCG
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Textbook Question
Chapter 54, Problem 3A
In a population in which individuals are uniformly distributed
a. the population is probably well below its
b. natural selection should favor traits that maximize the ability to compete for resources.
c. immigration from other populations is probably keeping the population from going extinct.
d. None of the choices is correct.
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Consider global warming, a continual gradual increase in average temperatures. How might you expect this to affect natural
selection?
A.environmental changes are unpredictable, and natural selection is a random process, so it is difficult to predict outcome
B.species from warmer climates are likely to expand their ranges into higher latitudes
C.traits that increase reproductive success under warmer temperatures are likely to increase in frequency in a population
D.the stress caused by higher temperatures will increase mutation rates
Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice?
Group of answer choices
A. The rock pocket mice have a mutation in a gene that leads to the dark fur color.
B. Individuals change color to blend in with the environment
C. Predators eat light-colored rock pocket mice.
D. There is dark lava rock in the area where they live
E. All of the answers are correct
F. None of the answers are correct
Which statement is correct, based on current evolutionary theory?
a.
Selection will favor alleles only if they are good for the species.
b.
Selection will favor alleles only if, on average, they increase the reproductive success of individuals who have them.
c.
In small populations genetic drift can be more effective than natural selection in building adaptations.
d.
Selection sometimes favors alleles that systematically lower the reproductive success of the individuals who have them.
e.
Two of the above are correct.
Chapter 54 Solutions
BIOLOGY 12E CONNECT ACCESS CARD
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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- What is a cline? A. Discrete changes in genetic or phenotypic characteristics of a population over geographic space. B. Similar genetic or phenotypic characteristics of a population within the same geographic space. C. A gradual change in genetic or phenotypic characteristics of a population over geographic space. D. A gradual change in genetic or phenotypic characteristics of a population within a set geographic space.arrow_forwardStudies of opossums in Georgia have found that individuals from a population on an offshore island have longer lifespans in captivity than individuals from mainland populations. What is a reasonable explanation for this pattern? Group of answer choices a. the island opossums are vampires b. the opossums from the island have a history of being kept in captivity c. he opossums on the island have a lower metabolic rate d. there are fewer predators on the island compared to the mainlandarrow_forwardDarwinian fitness is a measure of a. survival. b. reproductive success. c. heterozygosity of the gene pool. d. polymorphisms in a population.arrow_forward
- What is a cline? A. A gradual change in genetic or phenotypic characteristics of a population within a set geographic space. B. A gradual change in genetic or phenotypic characteristics of a population over geographic space. C. Similar genetic or phenotypic characteristics of a population within the same geographic space. D. Discrete changes in genetic or phenotypic characteristics of a population over geographic space.arrow_forwardMuch research on extinction has focused on small populations, which are vulnerable for numerous reasons. A cyclical chain of events causing a small population to decline even further and become vulnerable to processes that lead to extinction is called an extinction vortex. Which of the following is not one of the factors leading to this phenomenon? A. Inbreeding between individuals in the population B. Little genetic variation in the population C. low tolerance to environmental stochasticity D. metapopulations with high connectivity E. low fitness of individuals within the populationarrow_forwardChoose one sentence that best describes a consequence of genetic drift a. Alleles in small populations are less likely to become fixed than those in large populations b. Large populations tend to lose genetic diversity faster than small populations c. New mutations are equally frequent in large and small populations d. Small populations tend to lose genetic diversity faster than large populationsarrow_forward
- When male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms? a. natural selection b. genetic drift c. gene flow d. random matingarrow_forwardA small number of animals moves away from a large ancestral population on the continental mainland and colonizes an island. Which of the following is likely to occur? A. Genetic diversity will decrease on the mainland, because of a population bottleneck. B. Alleles that were more rare on the mainland are likely to become more common on the island, because of the founder effect. C. Genetic diversity will be lower on the island than the mainland, because of the founder effect. D. Mutations rates will increase on the island, in response to selection pressures in the new environment.arrow_forwardWhich of the following evolutionary forces can introduce new genetic variation into a population? a. natural selection and genetic drift b. mutation and gene flow c. natural selection and nonrandom mating d. mutation and genetic driftarrow_forward
- Which of the following is an advantage of sexually reproducing populations over asexually reproducing populations? A. Sexually reproducing populations produce genetically identical offspring. B. Sexually reproducing populations require partners to reproduce. C. Sexually reproducing populations are more resilient against the effects of harmful mutations. D. Sexually reproducing populations do not require partners to reproduce.arrow_forwardWhich of the following evolutionary forces tends to remove genetic variation from a population? A. Mutation B. Gene flow due to immigration into a population C. Genetic Drift D. Disassortative mating E. Non-random matingarrow_forwardOver the past several decades, natural selection has caused populations of Staphylococcus aureus (an infectious wound bacterium) to evolve resistance to most antibiotics. If antibiotic use were stopped, what would you predict would happen to these S. aureus populations? A. Horizontal gene transfer would increase B. The populations will begin colonizing new environments. C. The frequency of resistant forms will definitely increase in these populations. D. They will go extinct without the antibiotic. E. The frequency of nonresistant forms will increase in these populations.arrow_forward
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