BIOEE 2780 Practice Prelim 2 (2006)

BIOEE 2780 Practice Prelim 2 (2006) - PRACTICE EXAM 1 In...

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PRACTICE EXAM 1. In 2003 the journal Nature reported the following phylogeny for mammalian carnivores found on the large island of Madagascar (off the east coast of Africa). The geographic range is part of the common name of the species [Malagasy = from Madagascar]. Indian African African Malagasy Malagasy Malagasy lion civet mongoose mongoose civet fossa (a) Geological studies have shown that the island of Madagascar has most recently been connected to India, and it had been previously hypothesized that the Madagascar carnivores should therefore be most closely related to Indian carnivores. Does the phylogeny above support this hypothesis? Why or why not? (b) Another hypothesis was that the extremely diverse Malagasy carnivore fauna had originated from three separate colonization events by African species. Specifically, it was hypothesized that the ancestors of Malagasy mongoose, civet and fossa had each independently dispersed across water from Africa to Madagascar. Does the phylogeny above support this hypothesis? Why or why not? (c) What alternative to these two hypotheses [in (a) and (b)] is suggested by the phylogeny above? Explain your reasoning. (d) The African and Malagasy civets are classified together into the family Viverridae, and the African and Malagasy mongooses are classified together into the family Herpestidae. Based on the phylogeny, are these families cladistically correct? Why or why not? 2. In one clear sentence, define the Evolutionary Species Concept: 3. Justify or refute the statement: “Reinforcement occurs most rapidly when populations are separated by strong geographic barriers to dispersal”.
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4. DNA sequence data for some members of the horse family are shown in the table below. Code SPECIES Nucleotide Site 1 2 3 4 5 6 7 O Deer (outgroup) T A C C A C G A Equus przewalski (Przewalski’s horse) A T G C T C T B Equus burchelli (zebra) A A G C A C G C Equus asinus (wild ass) T A G G T C G D Equus caballus (domestic horse) A T
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This note was uploaded on 10/26/2008 for the course BIOEE 2780 taught by Professor Geber during the Fall '07 term at Cornell.

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BIOEE 2780 Practice Prelim 2 (2006) - PRACTICE EXAM 1 In...

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