Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 39.4, Problem 3CC
MAKE CONNECTIONS How might a learned behavior contribute to
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MAKE CONNECTIONS If a population stopped reproducing sexually (but still reproduced asexually), how wouldits genetic variation be affected over time? Explain.(See Concept 13.4.)
MAKE CONNECTIONS Describe how Tiktaalik’sfeatures illustrate Darwin’s concept of descentwith modification (see Concept 22.2).
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.
Chapter 39 Solutions
Campbell Biology in Focus
Ch. 39.1 - Contrast the role of Ca2+ in the contraction of a...Ch. 39.1 - WHAT IF? Why are the muscles of an animal that has...Ch. 39.1 - Prob. 3CCCh. 39.2 - Prob. 1CCCh. 39.2 - Prob. 2CCCh. 39.2 - Prob. 3CCCh. 39.3 - Prob. 1CCCh. 39.3 - MAKE CONNECTIONS How is the lunar-linked rhythm of...Ch. 39.4 - How might associative learning explain why...Ch. 39.4 - Prob. 2CC
Ch. 39.4 - MAKE CONNECTIONS How might a learned behavior...Ch. 39.5 - Prob. 1CCCh. 39.5 - MAKE CONNECTIONS Balancing selection can maintain...Ch. 39.6 - Prob. 1CCCh. 39.6 - Prob. 2CCCh. 39 - During the contraction of a vertebrate skeletal...Ch. 39 - Prob. 2TYUCh. 39 - According to Hamiltons rule, A. natural selection...Ch. 39 - The binding of calcium to the troponin complex A....Ch. 39 - Curare, a substance that blocks the acetylcholine...Ch. 39 - Prob. 6TYUCh. 39 - Prob. 7TYUCh. 39 - SCIENTIFIC INQUIRY Propose a hypothesis to explain...Ch. 39 - Prob. 9TYUCh. 39 - Prob. 10TYUCh. 39 - FOCUS ON INFORMATION Learning is defined as a...Ch. 39 - Prob. 12TYU
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- Make Connections Describe three more examples ofmutualisms. (See Figure 27.19, Figure 38.4, and Concept 41.4.)arrow_forwardMAKE CONNECTIONS Balancing selection can maintain variation at a locus (see Concept 23.4). Based on theforaging experiments described in this chapter, devise asimple hypothesis to explain the presence of both for Rand forsalleles in natural fly populationsarrow_forwardHow can researchers test the hypothesis that clinal variation among populations of a particular species has a genetic basis?arrow_forward
- EVOLUTION CONNECTION Explain the biological basis forassigning all human populations to a single species. Can youthink of a scenario by which a second human species couldoriginate in the future?arrow_forward. Summarize key differences between allopatric and sympatric speciation. Which type of speciation is more common,and why?arrow_forwardQ1: Within which category are individuals most closely related to one another? Q2: Within which category are individual species most distantly related? Q3: Are individual species more closely related within the same order or within the same family?arrow_forward
- INTERPRET DATA Which of the primates in Figure 18-18 is the most distantly related to humans? Explain your answer. Figure 18-18 Differences in DNA nucleotide sequences as evidence of evolutionary relationships Comparing the same gene in different organisms provides a window into evolution. Here the differences in the non-protein-coding region of the -globin gene are compared between humans and other primates. Evolutionary biologists are rapidly expanding such studies from comparing one or several genes to comparing entire genomes.arrow_forwardPlease Help! Q1) Butterflies in Africa (species 1) pollinate just one species of flower with a short corolla reducing the variation in the length of the tongue of its pollinators. Butterflies in Europe (species 2) have variable lengths as they pollinate several different species of flowers. What is the mechanism shaping the length of the tongue in species 1?______ Q2) A variation on what morphological trait made the difference between life and death among all surviving finches in the draught of 1977? (one-word answer)arrow_forward1. Captive breeding programs can reestablish the populations of threatened species in the wild, but they failed in all cases. True or False? 2. Analogy is similarity due to convergent or parallel evolution. True or False?arrow_forward
- Review why you might see a cline across a geographical area. Explain why you are more likely to see a cline when there is gene flow between populations. What could happen if the gene flow becomes restricted across a cline? Explain.arrow_forwardMAke ConneCtIonS Suppose that a sudden changein environmental conditions caused a substantial dropin a population’s carrying capacity. Predict how naturalselection and genetic drift might affect this population.(See Concept 23.3.)arrow_forwardQ2) Define Natural Selection. List and describe the 3 postulates offered by Darwin to explain natural selection How does natural selection produce adaptations?arrow_forward
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