TH Form BBBB (1) - 2009 CH 24, 25 BBBBB Multiple Choice...

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2009 CH 24, 25 BBBBB Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Some claim that the birds should continue to be placed in a class (Aves) separate from the Reptilia, despite evidence from molecular systematics indicating a close relationship between birds and crocodiles. Their claim is based on the extent of the adaptations that birds have undergone for flight. The logic of their claim is most similar to that found in which statement? a. Humans should be placed in their own order because no other member of the order Prim- ates features so many modifications for bipedalism. b. Convergent evolution has made the cacti of the New World and the euphorbs of the Old World so alike in appearance that they ought to be placed together in the same taxon. c. Koalas (Australian marsupials that feed on Eucalyptus leaves. should be placed in a new family because they are so similar in appearance to true (eutherian) bears. d. Pterodactyls are an extinct group of reptiles that were well-adapted for flight and, thus, were the first birds. e. Dolphins should be classified as fish because of their streamlined bodies and dorsal fins. Use the figure below to answer the following questions. ____ 2. Which species are extinct? a. A and B b. cannot be determined from the information provided c. D and E d. A and E e. C and D ____ 3. A common ancestor for both species C and E could be at position number a. 2. b. 3. c. 5. d. 1. e. 4.
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____ 4. The two extant species that are most closely related to each other are a. B and C. b. C and D. c. E and A. d. A and B. e. D and E. ____ 5. Which extinct species should be the best candidate to serve as the outgroup for the clade whose common an- cestor occurs at position 2? a. D b. A c. E d. B e. C Use the figure below to answer the following questions. Morphologically, Species A is very similar to four other species, B-E. Yet the nucleotide sequence deep with- in an intron in a gene shared by all five of these eukaryotic species is quite different in Species A compared to that of the other four species when one studies the nucleotides present at each position. ____ 6. If the sequence of Species A differs from that of the other four species due to simple misalignment, then what should the computer software find when it compares the sequence of Species A to those of the other four spe- cies? a. If the software compares, not nucleotide sequence, but rather the amino acid sequence of the actual protein product, then the amino acid sequences of species B-E should be similar to each other, but very different from that of Species A. b. The sequences of species B-E, though different from that of Species A, should be identical to each other, without exception. c.
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This note was uploaded on 05/06/2010 for the course BIOLOGY 02541 taught by Professor Jcobs during the Spring '10 term at Wilson Tech.

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TH Form BBBB (1) - 2009 CH 24, 25 BBBBB Multiple Choice...

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