Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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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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Students have asked these similar questions
Individuals in a population of sunflowers have a range of flower sizes, and the average diameter of their flowers is 5 cm. What effect would selection have on flower diameter in this population of sunflowers?
A. The average flower diameter may not change if the population is under disruptive selection.
B. Small flowers are favoured if the population is under disruptive selection.
C. The average flower diameter will increase if the population is under stabilizing selection.
D. Large flowers are favoured if the allele for flower size is dominant when the population is under directional selection.
When taking the question, it would appear as:
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
Chapter 54 Solutions
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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.arrow_forwardA population of gophers is very isolated, so no individuals can move in/out of the population. It is very small, so random events affect allele frequencies and many traits are under strong selection. Males are chosen randomly. Which statement is correct? A. Allele frequencies in 10 generations will be different than they are today. B. Individual gophers are evolving traits they need to survive C.Genetic drift is not acting on the gophers D. The population is in Hardy-Weinberg equilibriumarrow_forwardWhat 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_forward
- Studies 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_forwardHardy Weinberg equilibrium (HWE) describes a situation in which the relative frequencies of alleles do not change over generations. which of the following could prevent HWE from being maintained? A. New mutations B. All individuals reproducing equally C. Random mating D. No individuals entering the populationarrow_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_forwardHigh values for heterozygosity (or expected heterozygosity) at a genetic locus in a population indicates that there is: a. A lot of genetic variation b. Little genetic variation c. A population not under HW equilibrium d. A large amount of homozygosityarrow_forwardThe Hardy-Weinberg equation characterizes the allele and genotypefrequenciesa. of a population that is experiencing selection for mating success.b. of a population that is extremely small.c. of a population that is very large and not evolving.d. of a community of species that is not evolving.e. of a community of species that is experiencing selection.arrow_forward
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