exam 4 key late section

exam 4 key late section - 22 Reconstructing and Using...

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Evolution BIO 370 Page 1 Fall 2008: Exam #4 11:00 AM Section Name: ____ KEY ______________________ Part I: Multiple Choice. [4 points each] Circle the correct letter for each question on this page. 1. Which of the following is not a consequence of the evolution of photosynthesis? a) The earth is now warmer than it would have been without photosynthesis b) The ozone layer c) The evolution of complex multicellular organisms d) Reduced levels of carbon dioxide in the atmosphere e) Evolution of mechanisms to remove O 2 from areas where it is not needed for metabolism f) a and c g) d and e h) a and d 2. A phylogeny might be an indispensable tool for studying which of the following cases? a. Studying behavioral adaptations in a set of monkey species b. Figuring out the temporal sequences of character changes c. Current relative fitness of males in a population d. b and c e. a and b f. all of the above g. none of the above 3. Which is most likely to form a fossil? a. a terrestrial worm b. a jelly fish c. a clam d. a short lived lineage of terrestrial lizards e. a and b f. a and c g. all of the above will be equally preserved 4. The fig wasp/nematode coevolutionary relationship a. is an example of antagonistic coevolution b. is a an example of a positive coevolutionary relationship c. has more virulent nematodes when more female wasps enter a fig d. has lower virulence nematodes when vertical transmission predominates e. a, b and c f. only a and c g. a, c, and d h. only c and e i. only b and d 5. Parsimony is a good way to select the best phylogenetic tree when there are conflicts a. if the traits used for reconstruction evolve very quickly b. if all of the traits used are analogies c. if traits only change infrequently d. only when using molecular characters e. only when using morphological characters f. none of the above g. c and e h. a and b
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Evolution BIO 370 Page 2 Fall 2008: Exam #4 11:00 AM Section Name: ____ KEY ______________________ Part II. Terms . For each term, provide a brief definition that also indicates why the term is important in evolutionary biology . Where appropriate, feel free to provide an example. [4 points for each term] 6. discrete character a character that falls into distinct categories, e.g., different colors, as opposed to being continuously variable. Important because when studying adaptation [using the comparative method] we have to use different methods for discrete and continuous characters. 7. positional homology A situation during alignment of sequences for phylogenetic reconstruction where each column of the alignment represents the true evolutionary history of the nucleotide or amino acid at that position. Important because if an alignment does not preserve the positional homology of the sequences, then the phylogenetic inference will likely be incorrect in at least some places on the tree. 8. stromatolites
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This note was uploaded on 08/24/2009 for the course BIO 370 taught by Professor Edwards during the Spring '08 term at University of Texas.

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exam 4 key late section - 22 Reconstructing and Using...

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