Campbell Biology: Concepts.. (Custom Package)
8th Edition
ISBN: 9781323042649
Author: Central Texas
Publisher: PEARSON
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Chapter 13, Problem 4TYK
Natural selection is sometimes described as “survival of the fittest.” Which of the following best measures an organism’s fitness?
a. how many fertile offspring it produces
b. how strong it is when pitted against others of its species
c. its ability to withstand environmental extremes
d. how much food it is able to make or obtain
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Chapter 13 Solutions
Campbell Biology: Concepts.. (Custom Package)
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- Natural selection occurs when which of the following conditions are met? Group of answer choices a.Variations between individual organisms lead to differential survival chances. b.The conditions in an ecosystem support a wide range of living organisms c.Individual organisms depend on each other to obtain available resources. d. Habitat and nutrient resources in an area are plentiful over a long period of time.arrow_forwardWhich aspect(s) of natural selection is(are) illustrated by the figure below? Check ALL answers that apply. A. Variation among individuals must be genetically transmissible to the next generation. B. Variation must exist in a population. C. Variation among individuals leads to differences in lifetime reproductive success. D. More individuals are produced each generation than the environment can support, resulting in competition for survival.arrow_forwardAccording to Darwin’s model of evolution, evolution can only occur if there is some variation present among the individual members of a population. Which statement best describes the source of this variation among members of a species? A) variation exists because different individuals will have different access to food and other resources B) individuals will vary depending on geography and climate C) variation exists because not all genes will be affected D) variation among individuals may arise as a result of mutations in the genetic codearrow_forward
- Which statement illustrates the connection between natural selection and overreproduction of a population? a) populations vary in their inherited traits. b) species produce more offspring than can survive in the environment. c) individuals with inherited traits that promote survival tend to have more surviving offspring. d) individuals with traits that do not enhance survival cannot reproduce.arrow_forwardWhich of the following is NOT a characteristic of natural selection? a) Variation exists among individuals in a population b) Some individuals are better adapted to their environment than others c) Organisms evolve to fit a predetermined goal or plan d) The better-adapted individuals are more likely to survive and reproducearrow_forwardNatural selection operates on populations over many generations. Which of the following allows natural selection to occur? A. the desire and the advantage of a population to remain constant B. the old age of the individuals which causes them to die C. the abilty for populations to change quickly from one trait to the next D. the unequal ability of individuals to survive and reproducearrow_forward
- Does natural selection occur when which of the following conditions are met? A. Variations between individual organisms lead to differential survival chances. B. The conditions in an ecosystem support a wide range of living organisms C. Individual organisms depend on each other to obtain available resources. D. Habitat and nutrient resources in an area are plentiful over a long period of time.arrow_forwardAccording to Darwin’s model of evolution, evolution can only occur if there is some variation present among the individual members of a population. Which statement best describes the source of this variation among members of a species? A) individuals will vary depending on geography and climate B) variation exists because not all genes will be expressed C) variation among individuals may arise as a result of mutations in the genetic code D) variation exists because different individuals will have different access to food and other resourcesarrow_forwardWhich type of selection results in greater genetic variance in a population? a. stabilizing selection b. directional selection c. diversifying selection d. positive frequency-dependent selectionarrow_forward
- a). define fitness in terms of an evolutionary term what does fitness mean? b). by what process would analogous structures evolve so they look alike? c). by what process would 2 related but geographically separated groups evolve similar adaptations independently.arrow_forwardNatural selection is known to modify the population, stating that “the fittest individuals survive and reproduce, passing on their traits from generation to generation”. Give an example.arrow_forwardBiologists sometimes say that “natural selection depends on the specific environment where a species lives.” What does this statement mean? A) A) If populations of a species are in different environments, traits that individuals need to meet their needs in each environment will appear. B) Traits can be helpful or harmful. If populations of a species are in different environments, some traits that are helpful in one environment might be harmful in another environment. C) Traits are always either helpful or harmful, and the environment of a population doesn’t matter. If populations of a species are in different environments, the same traits will always be helpful. D) Species were formed to perfectly match their environment. The traits of individuals in a species depend on the specific environment in which they were created.arrow_forward
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