Lec_quiz2_F11_ans

Lec_quiz2_F11_ans - L111 Quiz#2 ANSWER KEY IMPORTANT THERE...

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L111 Quiz #2 – ANSWER KEY IMPORTANT – THERE ARE DIFFERENT VERSIONS OF THE QUIZ BUT ALL THE SAME QUESTIONS. THE QUESTIONS MAY NOT BE IN THE SAME ORDER AND THE ANSWERES MIGHT BE SWITCHED AROUND. THERE IS ONLY ONE ANSWER KEY – so compare your questions/answers carefully. 1. Circle the two cladograms below that are equivalent. (2pts) REVIEW THIS THINKING ABOUT COMMON ANCESTORS – how far back do you have to go to find a common ancestor between C&D and C&E. Compare (a) and (d) above. C&D share a more recent common ancestor with each other than they do with any of the others. C&D share a more recent common ancestor with E than they do with any of the others. Both (a) and (d) are showing us the same thing. 2. Assuming there is an outgroup depicted in the figure below, which species would be the outgroup. Explain. (2pts) GLOSSY IBIS Glossy Ibis is the only species shown on the cladogram that shares only the base common ancestor with the rest of the species. It branched off before the rest of the species. Therefore it is the most distantly related to all of the others. Every species, except for the Glossy Ibis, shares a more recent common ancestor than the base common ancestor shown here.
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3. Least Bittern is most closely related to whom (refer to the cladogram above)? (1pt) Great Egret, Great Blue Heron, Little Blue Heron and Snowy Egret are all equally related to the Least Bittern; and more recently than the Boat-billed Heron and the Glossy Ibis.
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