Pset2Questions+figures

The outgroup has gray scales no stripes a short

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of the five species, as well as in a more distantly-related outgroup. The outgroup has gray scales, no stripes, a short dorsal fin, a narrow body, and a preference for leafy hiding places. The other species, on the other hand, each have some combination of blue scales, stripes, a tall dorsal fin, a wide body, and a preference for rocky hiding places (each of which only evolved once in the genus), according to the following table: Which of the following trees best represents the phylogenetic relationships between the species according to the principle of parsimony? Attachments Question 1 of 5 4.0 Points Which of the following trees best represents the phylogenetic relationships between the species according to the principle of parsimony? A. A B. B C. C D. D E. E F. F Reset Selection Mark for Review What's This? Question 2 of 5 4.0 Points For the next three questions, assume that the most parsimonious tree above is correct. Answer the following based on the most parsimonious tree. Species 1 and 2 together form A. a monophyletic group
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4/12/13 6:34 PM 2013 Problem Set 2 on Evolution Lectures 4-6 Page 5 of 10 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment B. a paraphyletic group C. a synapomorphy D. a polytomy E. a clade F. None of the above Reset Selection Mark for Review What's This? Question 3 of 5 4.0 Points Based on the most parsimonious tree, Species 1 and 2 AND their common ancestor together form A. a monophyletic group B. a paraphyletic group C. a synapomorphy D. a polytomy E. a clade F. None of the above Reset Selection Mark for Review What's This? Question 4 of 5 4.0 Points Based on the most parsimonious tree, the Wide Body trait is an example of (choose ALL that apply). A. a convergent trait B. a homoplastic trait C. a synapomorphy D. a homologous trait E. an ancestral trait F. a derived trait Mark for Review What's This? Question 5 of 5 4.0 Points The following is a small bit of a large phylogeny of lizards that live in Central America (Mahler et al. 2010). Time proceeds from left to right. Their relationships are represented by the following phylogeny. If the blank tree represents the same relationships, how can one label the tips from top to bottom? Pick all that apply:
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4/12/13 6:34 PM 2013 Problem Set 2 on Evolution Lectures 4-6 Page 6 of 10 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment A. tropidogaster, trachyderma, poecilopus, lionotus, oxylophus B. tropidogaster, poecilopus, trachyderma, oxylophus, lionotus C. lionotus, oxylophus, tropidogaster, trachyderma, poecilopus D. tropidogaster, lionotus, oxylophus, trachyderma, poecilopus E. tropidogaster, trachyderma, poecilopus, oxylophus, lionotus
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4/12/13 6:34 PM 2013 Problem Set 2 on Evolution Lectures 4-6 Page 7 of 10 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment F. tropidogaster, trachyderma, lionotus, poecilopus, oxylophus G. need more information Mark for Review What's This?
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The outgroup has gray scales no stripes a short dorsal fin...

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