BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 40, Problem 11SA
Summary Introduction
Introduction:
Life histories have a genetic basis and are subject to natural selection. Most populations contain the combination of both r-selected and K-selected traits. One of the factors that affect life history traits is predation.
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Species that live in unpredictable habitats are more likely to show traits that are favored by _______. a. r-selection b. K-selection
Birds with average-sized wings survive storms better than those with longer wings or shorter wings. This illustrates _____.
a
directional selection
b
disruptive selection
c
the bottleneck effect
d
stabilizing selection
Which of the following are not agents of natural selection?
Select one:
A. Neutral interaction with another species
B. Competition among individuals for food and water
C. Competition among members of a population for prime nesting sites
D. Predation by another species
Chapter 40 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 40 - Most commonly, individuals of a natural population...Ch. 40 - The rate at which population size grows or...Ch. 40 - Suppose 200 fish are marked and released in a...Ch. 40 - Prob. 4SACh. 40 - For a given species, the maximum rate of increase...Ch. 40 - _______ is a density-independent factor that...Ch. 40 - Prob. 7SACh. 40 - Prob. 8SACh. 40 - Compared to the less developed countries, the...Ch. 40 - An increase in infant mortality will _______ a...
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- You arrive on an island that has not been previously studied by biologists. You discover a number of species of snails that bright colored shells and bodies with black bands. What type of species interaction is most likely to be the cause of natural selection for these colors? Group of answer choices a. predation b. competition c. mutualism d. commensalismarrow_forwardTwo different species cannot occupy the same niche in the same geographic area. If they do they will compete with one another for the same food and other resources. Eventually, one species will out compete the other. This is an example of natural selection. A) True B) Falsearrow_forwardThe Grants have studied finches on the Galapagos Islands for 40+ years. During times of drought, there is less green/flowering vegetation available as a food source for the finches. This leaves only the hard, thorny seeds. The Grants have found that during drought, finches with larger beaks survive at a higher rate because they can access the food source. This would be an example of __________. a. good genes hypothesis b. selective pressure c. handicap principle d. population variationarrow_forward
- Which of the following best states a condition which promotes natural selection of a species? A)One baby albino alligator, from a nest of 20 eggs, hatches in the Florida Everglades. B)The population of moths in a forest increased from 100 to 150 members. C)An ocean ecosystem consists of more algae than fish species. D)A female cat has a litter of 5 kittens instead of 6.arrow_forwardWithin a particular population, darkly colored rats are more likely to survive than more lightly colored individuals. This situation is likely to result in a. directional selection. b. stabilizing selection. c. disruptive selection. d. balancing selection.arrow_forwardWhich is an example of directional selection after several generations on an island population from an original population that had an equal number of individuals with thin, moderate, and thick sized legs? A. Anolis lizards that have evolved thinner legs b. Anolis lizards that have evolved thin and thick legs c. Anolis lizards that have evolved moderate sized legs d. All of the above E. none of the abovearrow_forward
- The average length of rabbit ears decreases gradually with increasing latitude. This is an example of which of the following? Group of answer choices a. genetic drift b. directional selection c. disruptive selection d. stabilizing selectionarrow_forwardWhat type of selection is representative of what would happen if the earth were to continually cool, and some bears, such as those with thin or no hair, moved south and other bears with very thick fur stayed up the north. In this type of selection event, both types of bears would be selected for. (a)disruptive selection (b)directional selection (c)stabilizing selection (d)sexual selectionarrow_forwardThe Grants have studied finches on the Galapagos Islabds for 40+ years. During times of drought there is less green/flowering vegetation available as a good source for the finches. This leaves only the hard seeds. The grants have found that during drought, finches with larger beaks survive at a higher rate because they can access food source. This would be an example of ____ A.Selective pressure B. good genes hypothesis C. handicap principle D. population variationarrow_forward
- Which of the following is NOT considered a genetic isolating mechanism? Question 2 options: a) Seasonal isolation b) Habitat preference c) Behavioral isolation d) A, B, and C are all genetic isolating mechanisms.arrow_forwardA population occupies heterogeneous environments in which the fitness of some genotypes is higher in one environment and the fitness of other individuals is higher in another environment. This situation is likely to result in a. directional selection. b. stabilizing selection. c. disruptive selection. d. balancing selection.arrow_forwardWhat condition(s) is/are necessary for the development of both antagonistic and mutualistic coevolutionary relationships?A. Intimate pairwise interactions with one or more species.B. The agents of selection that are relevant to the populations must evolve.C. Frequency-dependent selection.D. All of the above are necessary for the development of coevolutionary relationships.arrow_forward
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