Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 27.4, Problem 3CC
MAKE CONNECTIONS The radiation of bilaterians in marine environments from 535 to 400 million years ago demonstrates that evolution is not goal oriented— it is not, for example, directed toward the origin of terrestrial vertebrates. Explain. (Review Concept 23.4.)
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MAKE CONNECTIONS Hawaiian silverswords underwent a remarkable adaptive radiation after their ancestor reached Hawaii, while the islands were still young(see Figure 25.22). Would you expect the cattle egretto undergo a similar adaptive radiation in the Americas(see Figure 52.18)? Explain.
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Chapter 27 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 27.1 - Prob. 1CCCh. 27.1 - Prob. 2CCCh. 27.2 - What is the Cambrian explosion? Why is it...Ch. 27.2 - Prob. 2CCCh. 27.3 - Prob. 1CCCh. 27.3 - WHAT IF? Would it be accurate to describe the...Ch. 27.4 - Prob. 1CCCh. 27.4 - Describe two key adaptations of aquatic...Ch. 27.4 - MAKE CONNECTIONS The radiation of bilaterians in...Ch. 27.5 - Describe two adaptations that have enabled insects...
Ch. 27.5 - MAKE CONNECTIONS Compare and contrast how the...Ch. 27.6 - Describe three key amniote adaptations for life on...Ch. 27.6 - Prob. 2CCCh. 27.6 - WHAT IF? Which came first, the chicken or the egg?...Ch. 27.7 - Describe how ocean communities changed in the...Ch. 27.7 - Prob. 2CCCh. 27.7 - Prob. 3CCCh. 27 - Prob. 1TYUCh. 27 - Fossil steroid and molecular clock evidence...Ch. 27 - Which of the following was probably the least...Ch. 27 - Prob. 4TYUCh. 27 - Prob. 5TYUCh. 27 - Prob. 6TYUCh. 27 - Prob. 7TYUCh. 27 - FOCUS ON EVOLUTION In Figure 27.29, circle the...Ch. 27 - FOCUS ON ORGANIZATION Early tetrapods had a...Ch. 27 - SYNTHESIZE YOUR KNOWLEDGE Collectively, do these...
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- Please exaplain 1. One of the explanations for the diversity seen in the fossils corresponding to the Cambrian explosion is the existence of an evolutionary “arms race” between predators and prey. True or False ? 2.Our planet is undergoing such a rapid transition that we may have shifted into a new epoch: the Anthropocene. True or False?arrow_forward. WHAT IF? Imagine that we could replay the history oflife. Is it possible that a group of vertebrates that colonized land could have arisen from aquatic gnathostomesother than the lobe-fins? Explain.arrow_forward20+ years ago, the view of paleontologist and paleoanthropologist on the human evolution is linear/step-ladder where in one specie first then become extinct and then new species came out. Is this true? Explain well and give examples.arrow_forward
- Define convergent evolution, and discuss how the cephalopod eye and the vertebrate eye demonstrate this phenomenon.arrow_forwardEVOLUTION CONNECTION Living members of a vertebratelineage can be very different from early members of the lineage,and evolutionary reversals (character losses) are common. Giveexamples that illustrate these observations, and explain theirevolutionary causes.arrow_forwardMAKE CONNECTIONS Many new animal body plansemerged during and after the Cambrian explosion. Incontrast, cnidarians today retain the same diploblastic,radial body plan found in cnidarians 560 million yearsago. Are cnidarians therefore less successful or less “highlyevolved” than other animal groups? Explain.(See Concepts 25.3 and 25.6.)arrow_forward
- EVOLUTION LINK Examine the cladogram in Figure 30-6a. Based on the discussion in this chapter, what were some of the types of data that biologists used to determine these phylogenetic relationships?arrow_forwardExplain how a cladistic classification for the vertebrates produces important regroupings of the traditional vertebrate taxa (refer to Figure 23.2). Why are Agnatha and Reptilia, as traditionally recognized, inconsistent with cladistic principles?arrow_forward(5) Fishes and aquatic amphibians possess a lateral line system, while aquatic mammals and reptiles do not. In terrestrial amphibians, larvae have lateral line systems that disappear when the larvae metamorphose into adults. Please record on the phylogeny below where you believe the lateral line system evolved and/or was lost.arrow_forward
- When and where did Homo sapiens originate? Evaluate which hypothesis better supports the current evidence: the multi regional hypothesis (Also called regional continuity model) or the out of Africa hypothesis. (also called the replacement model).Support your answer with a discussion of the behavioral, fossil and genetic lines of evidence for the evolution of modern humans.arrow_forwardElaine Morgan makes the case that humans may have an aquatic ancestor in recent evolutionary past. Do you agree with Elaine Morgan’s assertion that human evolved in an aquatic environment? Explain.arrow_forwardSee attached. 1. Which pair of animals in numbers 1-3 belongs to a common ancestral group? Explain your answer.2. Fossils and anatomical records both provide pieces of evidence of evolution. How do you determine the age of fossils of an Aurorazhdarcho micronyx and an Archeopterix?arrow_forward
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