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Evol_exam2key - Name PID Number BIOLOGY 201 SECTION 007...

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Unformatted text preview: Name PID Number BIOLOGY 201 SECTION 007 Drs. Willett and Reice SECOND MIDTERM October 30, 2007 Please write your name on all pages. Keep your answers brief and to the point. Limit your written answers to the space provided. Excess writing is not appreciated and will not be graded. Write clearly or print. On quantitative problems show all steps of your calculations. Note the at Question 7 has a lot of points. 1. Fill in the blanks. (12.5 Points, 2.5 points each) One process that can lead to the accumulation of deleterious mutations in small asexual populations is called Elulter '5 iamf and it can provide a long—tem‘r benefit of sexual reproduction. a. A character is said to be mi in nu. when it is derived with or without modification from a common ancestor. The geographic term for speciation that occurs within a single region with ample opportunity for-encounters between individuals of each developing species is called guard“ L speciation. The geological period at the beginning of the Cenozoic in which mammals, angiospem'ls, and birds radiated is the ’lgfimr‘e period. The first hominid from the genus Homo found in Asia that may have left Africa about 1.5 . air-1.01445 million years ago is 2. Multiple Choice (15 points, 3 points each)-Circle the entire correct answer. a. This species concept states that a species is a single lineage of populations that maintains its identity from other such lineages and has its own historical fate and evolutionary tendencies: 1. Recognition species concept 2. Biological species concept .3. Phylogenetic species concept 4. Evolutionaryspecies conce ' 5. Co esron species concept . . The fossil Lucy which is an Australopithecus afarensr's displays which of the following important hominid traits found in modem humans: ' 1. En ous cheek teeth and jaws { 2. Bi; edalism D ' . 3. Dramatically larger brain size than other modern great apes I 4. Flat face with high steep foreheads ' ' ' ‘ 5. All of the above ' ' Name c. Which of the following is NOT likely to be contributing to the current rash of extinctions associated with humans: 1. Hunting 2. Habitat destruction 4. Climate Change 5. All of the above are contributing d. The group “reptiles” which does not include birds or mammals but does contain their ancestors would be: 2. Peripheral 3. Monophyletic 4. Multiphyletic 5. Synapomorphic e. Which of the following is NOT true about early animal origins and the Cambrian explosion? 1. The Cambrian explosion is associated with both the rapid diversification of animal phyla and the first appearances of hard body parts that preserve well in the fossil record. 2. The evolution of HOX genes through gene duplications is likely to have been involved in the diversification of metazoan body plans. 3. Examples from most of the major animal phyla can be found by the end of the Cambrian explosion. 4. The Cambrian explosion was likely to have been triggered by an asteroid impact and subseuent climate change. 5. All of the above are true. 3. Speclation (7 points, 3.5 points each) Delinefdescn'be the these terms: a. Intrinsic postzygotic reproductive isolation: _ . MMJL “flick-rub“ Jul.- ucco-KC «Her raise-“hiss finch-r. ' - ' ' ' A . 0&9 “DEAL 53.1”; M l"Itaiirrrsu‘ln ‘fi‘fl‘b: "4:3" . an; hirmnhm d: 133'“ \n‘rrigsic. rug-F5 AH? M5 fepmmfl— tibia-3m: hams + (c. |Akflcjg~bfis all-«A Minot-AH finJvafl-n - .11?» b. Vicariance: A lwmér -iu ru- n A, a dub-p Ali-mm *‘b al'J‘Ufl‘B‘v “Ma-1.4M} Par/Ewrilfifla G A ~ . Name DJ 4. Phylogeny reconstruction (10.5 points): In trying to figure out the relationships between a closely related group of species of finches. you have examined the sequence of a section of mitochondrial DNA from each of these bird species. You find three fixed differences between the species in the sequence and also look at two morphological traits (character matrix below). Answer the following questions: Sequence Characters Morphological character taxon 1 2 3 Beak size Feather color Goldfinch (GF) G T G small yellow Evening Grosbeak (EG) A C C large yellow House Finch (HF) G C G small red Outgroup (OUT) A C C A large red 3. Which of the three sequence characters is NOT a synapomorphy (1.5 points)? Charo-GM L- b. Map the changes in each of the three sequence characters onto each of the two trees below by placing a dash on a branch next to which is indicated the character number and direction of change [e.g. ---1 (A to G)]. Then, CIRCLE the tree that is the most parsimonious of the two based 8n these three sequenece charactear's only (5 points): 1 c. l. (L G i i 2 i OUT GF 3 awe-avfi c. Now considering the two morphological characters: (1) Which character displays homoplasy? (2) Reproduoe the most parsimonious tree below and (3) show a mapping of this single morphological character on this tree and then (4) name what type of homoplasy it shows (4 points): (1). ammo? 0; Mai“ (2.3). our so CF (4? (4)_ emf-9. NJ mm F1 as) ...
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Evol_exam2key - Name PID Number BIOLOGY 201 SECTION 007...

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