BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 21, Problem 3A
Convergent evolution is often seen among species on different islands because
a. island populations are usually smaller and more affected by genetic drift.
b. disruptive selection occurs commonly on islands.
c. island species are usually most closely related to species in similar habitats elsewhere.
d. when islands are first colonized, many ecological
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Chapter 21 Solutions
BIOLOGY
Ch. 21.1 - Prob. 1LOCh. 21.1 - Prob. 2LOCh. 21.2 - Prob. 1LOCh. 21.2 - Distinguish between demonstrating that evolution...Ch. 21.3 - Contrast the processes of artificial and natural...Ch. 21.3 - Prob. 2LOCh. 21.4 - Prob. 1LOCh. 21.4 - Prob. 2LOCh. 21.4 - Prob. 3LOCh. 21.5 - Explain the evolutionary significance of...
Ch. 21.5 - Prob. 2LOCh. 21.6 - Prob. 1LOCh. 21.6 - Prob. 2LOCh. 21.7 - Characterize the criticisms of evolutionary theory...Ch. 21.7 - Prob. 2LOCh. 21 - Suppose that a male with a beak depth of 10 mm...Ch. 21 - Prob. 1IQCh. 21 - Prob. 2IQCh. 21 - Prob. 3IQCh. 21 - Why might the evolutionary line leading to...Ch. 21 - Artificial selection is different from natural...Ch. 21 - Gaps in the fossil record a. demonstrate our...Ch. 21 - The evolution of modern horses (Equus) is best...Ch. 21 - Homologous structures a. are structures in two or...Ch. 21 - Convergent evolution a. is an example of...Ch. 21 - Prob. 6UCh. 21 - The possession of fine fur in 5-month human...Ch. 21 - In Darwins finches, a. occurrence of wet and dry...Ch. 21 - Prob. 2ACh. 21 - Convergent evolution is often seen among species...Ch. 21 - What conditions are necessary for evolution by...Ch. 21 - Explain how data shown in figure 21.2a and b...Ch. 21 - Prob. 3SCh. 21 - Refer to figure 21.5, artificial selection in the...Ch. 21 - The ancestor of horses was a small, many-toed...
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- 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_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_forwardThe pupfishes in the Death Valley region are an example of which evolutionary process? (a) background extinction (b) allopatric speciation (c) sympatric speciation (d) allopolyploidy (e) paedomorphosisarrow_forward
- Which 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_forwardWhy are humans so genetically similar within our species? A. Humans are not very genetically similar to one another. B. Because humans evolved in one location (Africa) and we have existed as a species for very long time. C. Because humans evolved in multiple locations around the world at different times. D. Because humans evolved in one location (Africa) and we haven't existed as a species for very long.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
- Increases in species diversity arise because of A)increases in the rate of speciation. B)decreases in the rate of extinction. C)higher rates of speciation than extinction. D)All of the above The rates of extinction since the origin of life have followed which pattern? A)Gradual decrease B)Gradual increase C)No change D)Several episodes of mass extinctions, with much lower rates of fluctuating extinctions in between Which of the following statements about the outcome of the evolution of a new species through hybridization is false? A)The new species is always an intermediate of the two parent species. B)The new species may have traits that allow it to inhabit environments different from both parental species. C)The new species may have greater genetic diversity and therefore greater trait diversity than the parental species. D)All of the above How can ecological processes influence the evolution of a population? A)Ecological…arrow_forwardAdaptive radiation a. is the result of enriched uranium used in power plants. b. is the evolution of closely related species adapted to use different parts of the environment. c. results from genetic drift. d. is the outcome of stabilizing selection favoring the maintenance of adaptive traits.arrow_forwardWhy are humans so genetically similar within our species? A. Because humans evolved in multiple locations around the world at different times. B. Because humans evolved in one location (Africa) and we have existed as a species for very long time. C. Because humans evolved in one location (Africa) and we haven't existed as a species for very long. D. Humans are not very genetically similar to one another.arrow_forward
- 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_forwardReduced tailbones and the associated remnant muscles in humans are an example of what type of evidence for common descent? (a) artificial selection (b) homologous traits (c) biogeography (d) fossil evidencearrow_forwardWhat is an Analogy? A) When an anatomic feature is shared among organisms and their descendants B) When two organisms appear the same C) When convergent evolution produces similar phenotypesarrow_forward
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