10 - Lab Midterm 2_answers - BioG1103, Lab Midterm 2...

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BioG1103, Lab Midterm 2 N a m e : 11/12/2008 Circle your section: 422 (1:25pm) 427 (7:30pm) 1. (8 pts) For the following four protists, give the genus, primary mode of locomotion, and label all structures indicated ( keep in mind that some objects look different in different organisms ). Genus: Euglena Genus: Peridinium Mode of locomotion: Flagellum Mode of locomotion: 2 trailing flagella Genus: Paramecium Genus: Amoeba Mode of locomotion: Cilia Mode of locomotion: Pseudopodia Polysaccharide plates Nucleus The black organelle. Reservoir Used for storage. Flagella What lies within this groove? Contractile vacuole Cytostome The black spot within the oral groove. Food vacuole Anal pore 1
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2. Consider the following phylogenetic tree of bunnies, showing both extant and extinct species (a – v). i. (1 pt) Name one of the extinct species. e, i, j, o, p, q ii. (1 pt) Which of the following is most closely related to species q? a) species ‘j’ b) species ‘k’ c) species ‘r’ d) species ‘u’ e) there is not enough information to answer this question. iii. (3 pts) Suppose species ‘a – e’, ‘g – h’, ‘k – o’, and ‘r – t’ all have fuzzy white tails whereas the others have no tail at all. a. Assuming that the tree correctly describes evolutionary relationships of bunnies, what is the minimum number of evolutionary events (event = acquisition or loss of a trait) required to explain the distribution of fuzzy white tails? 6; this is true whether you assume the ancestor has a tail or assume it does not have a tail. b. Indicate the positions of these changes on the tree by drawing a horizontal line through the appropriate branch while also noting whether the tail was gained (G) or lost (L). those shown indicate changes if the ancestor does not have a tail. iv. (1 pt) Circle a monophyletic group in the tree. 2
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3. (2 pts) Name two of the three Protistan supergroups believed to have acquired their chloroplasts through secondary endosymbiosis. Excavata
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This note was uploaded on 05/11/2010 for the course BIO G 103 taught by Professor Chen,k.c during the Fall '06 term at Cornell University (Engineering School).

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10 - Lab Midterm 2_answers - BioG1103, Lab Midterm 2...

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