Evolutionary Analysis (5th Edition)
5th Edition
ISBN: 9780321616678
Author: Jon C. Herron, Scott Freeman
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 8Q
Analogy and homology are important concepts used in comparing species. Traits are homologous if they are derived, evolutionarily and developmentally, from the same source structure. Traits are analogous if they have similar functions but are derived, evolutionarily and developmentally, from different source structures. A classic example of analogous structures is insect wings and bat wings. Which of the following pairs of structures are analogous and which arc homologous?
- a. The dorsal fins of a porpoise and a salmon
- b. The flippers of a porpoise and the pectoral fins (front fins) of a salmon
- c. The jointed leg of a ladybird beetle and a robin
- d. A rhesus monkey’s tail and a human’s coccyx
- e. The bright red bracts (modified leaves) of a poinsettia and the green leaves of a rose
- f. Red bracts on a poinsettia and red petals on a rose
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Chapter 2 Solutions
Evolutionary Analysis (5th Edition)
Ch. 2 - Review the kinds of evidence for evolution...Ch. 2 - Consider the experiment described in Section 2.1...Ch. 2 - In addition to dogs, list at least two or three...Ch. 2 - Look back at Figure 2.14d, which shows the two...Ch. 2 - Figures 2.20 through 2.22 show examples of...Ch. 2 - The transitional fossils in Figure 2.21...Ch. 2 - Section 2.4 presented two definitions of homology:...Ch. 2 - Analogy and homology are important concepts used...Ch. 2 - Figure 2.26 is an evolutionary tree showing the...Ch. 2 - According to the evolutionary tree shown in Figure...
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