BIOLOGICAL SCIENCE
7th Edition
ISBN: 9780135276822
Author: Freeman
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 3TYK
Which of the following best characterize an adaptive radiation?
a.
b. A single lineage diversifies rapidly, and descendant populations occupy many habitats and ecological roles.
c. Natural selection is particularly intense, because disruptive selection occurs.
d. Species recover after a mass extinction.
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Researchers have found fossils of Eocene horse species in Colorado. Deeper deposits contain smaller species, and more recent deposits contain larger species. How does this observation support the theory of evolution?
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It shows that all species are related to each other.
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It proves that environments have changed over time.
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Several very distantly related species (e.g., bats, birds, insects) have evolved the capability of flight. The most recent common ancestor of insects and vertebrates likely lived over 500 million years ago and was flightless. This independent evolution of flight in multiple, distantly related taxa is an example of what evolutionary process/pattern?
a.
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b.
Convergent evolution
c.
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d.
Synapomorphy
Place the following events in the order in which they are most likely to occur by numbering them from 1 to 5. a. Speciation occurs. b. Genetic divergence takes place. c. Geographic barrier arises. d. Gene flow is discontinued. e. Species adapts to a new environment.
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- The Galapagos archipelago consists of volcanic islands that formed within the last 5 million years. Darwin wrote of the finches on these islands, "...from an original paucity of birds in this archipelago, one species has been taken and modified for different ends." The Galapagos finches are an example of adaptive radiation driven by a. behavioural innovation. b. morphological innovation. c. ecological opportunity. d. physiological innovation.arrow_forwardAssume you are studying the fossil record of a certain lineage of sharks. You find that sharks in this lineage will maintain the same morphology for long periods of time and only rapidly change their morphology during a speciation event. The evidence you uncover is supportive of which of the following theories? a. Punctuated Equilibrium b. Gradualism c. Start and Stasis d. Increased Net Tempoarrow_forwardWhich of the following statement about the outcome of the evolution of a new species through hybridization is false? a.The new species may have traits that allow it to inhibit environments different from both parental species. b.The new species is always an intermediate of the two parental species c.The new species may have greater genetic diversity and greater trait diversity than the parental species. d.None of the above What are the two ways of looking into evolution in detail? a.Micro frequency change and ascent with modification b.Genotypic and phenotypic modification c.DNA frequency change and inheritance modification d.Allele frequency change and descent with modification Natural selection increases the frequencies of advantageous alleles and decreases deleterious alleles' frequencies. What are the three categories of natural selection depending on the favored traits? a.Directive, selective and native b.Indicative, normative and fixative c.Directional, stabilizing and…arrow_forward
- After the mass extinction that occurred 65 million years ago, mammals rapidly diversified to occupy habitats that were previously unavailable to them. What concept does this illustrate? A. Adaptive radiation B. Cretaceous selection C. Reproductive isolationD. Heterozygote advantagearrow_forwardWhich of the following is NOT true for the speciation of finches in the Galapagos islands? A. Natural selection acted on beak shape, and resulted in different beak morphologies for different food sources. B. Assortative mating reinforced existing divergence between birds. C. Speciation of finches started by birds starting to specialize on different food sources. D. Speciation of finches on the same island is due to allopatric speciation.arrow_forwardWhich of the following evidence is not consistent with the idea that evolution is responsible for the diversity of animals we see today? A. The presence of vestigial organs in extant species B. Structural homologies among very different animals C. Fossil records of intermediate life forms D. Earth is not the center of the galaxy or universe Which of the following is not a part of the allopatric speciation by natural selection model? A. Geographically isolated populations evolve or change in response to novel environments. B. Reproductive isolation evolves as a by-product of changes in other traits associated with adapting to new resources or environments. C. Selection against hybridization leads to exaggeration of signals to facilitate recognizing conspecifics( individuals of the same species). D. Changes among or between populations occur while populations are geographically separated. Which of the following is not an example of the evolution of a key innovation (anew trait)…arrow_forward
- Which of the following patterns of evolution is most supported by the fossil record? a. Descent with modification b. Hybrid speciation c. Stasis d. Punctuated disequilibriumarrow_forwardWhich of the following most likely demonstrates that classification is the basis of evolutionary relatedness? A. Organisms that share similar characteristics are impliedly understood to have common ancestors, thus having an evolutionary relationship. B. Classification is to organize organisms into groups based on their differences and similarities and evolutionary history, so as evolution changes, classification will also change C. Classification based on evolutionary relatedness always infer that all organisms that evolved similarly shares the same history. D. Homologous structures among organisms depicts the same evolutionary history or paths.arrow_forwardDerived characters are traits: A. that are more complicated than ancestral characters B. that characterize the last common ancestor of a particular collection of species. C. that have evolved after the last common ancestor of a particulan collection of species. D. that are less well suited to the environment than ancestral characters.arrow_forward
- The adaptive radiation of mammals following the extinction of the dinosaurs is an example of adaptive radiation due to a. physiological innovation. b. ecological opportunity. c. morphological innovation. d. behavioural innovation.arrow_forwardWhich of the following statements about evolution is false?a. Gene mutations alone amount to evolution. b. Genetic drift and gene flow are modern theories of evolution.c. Natural selection contributes to evolution.d. Chimpanzees evolved from a hominoid ancestor.arrow_forwardAdaptive radiations can be a direct consequence of three of the following four factors. Select the factor that is NOT a direct consequence of adaptive radiation. Select one: a. Genetic drift b. Vacant ecological niches (niches are environment "space" where a particular organism has resources required to survive and reproduce) c. New evolutionary innovations d. Colonization of a new region that contains suitable habitat and few competitor speciesarrow_forward
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