BIOL 1001M W2013 MI (Feb. 6) Key

B c d e confirmation of the reducing environment of

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Unformatted text preview: species. Genetic similarities and differences demonstrate species relatedness. Extremely different species are fundamentally unrelated in any way. The longer two species have evolved on their own, the fewer genetic differences between them. 4 BIOL 1001 Midterm I W2013 vA 16. Given Darwin's observations, if you discovered a fossil of an extinct mammal that lived high in the Andes mountains that run along the western part of South America (see figure above), which of the following would you predict? A. B. C. D. E. It would more closely resemble fossil mammals from mountains in Africa. It would more closely resemble present ­day mammals from mountains in Africa. Earthquakes and mountain formation are a major cause of extinction. It would more closely resemble present ­day mammals from South American jungles. It would more closely resemble present ­day mammals from Australia. 17. A critical finding of the Miller ­Urey experiment was A. B. C. D. E. confirmation of the reducing environment of early Earth. abiotic production of amino acids. packing of polymers in cell membranes that could exhibit rudimentary metabolism. polymerization of carbohydrates to form polysaccharides. abiotic production of ribozymes. 18. Which of the following would a biologist consider most important in determining which salamanders are the most fit? A. B. C. D. E. Large body size and the ability to move quickly away from predators. The ability to learn new behaviours. Large numbers of offspring surviving to reproductive age. Long lifespan and large numbers of offspring. Ability to compete for food. 19. The Hardy ­Weinberg principle acts as a null model because it describes the relationship between allele and genotypic frequencies under conditions where: A. B. C. D. Individuals in a population are not mating randomly. New species are differentiating. Evolution by natural selection increases the fitness of individuals. None of the four evolutionary forces is acting and mating is random. 5 BIOL 1001 Midterm I W2013 vA 20. Scientists have long thought that the 14 species of finches (which vary in their beak shape and size) on the Galápagos Islands evolved from a single species of finch (the warbler finch) that migrated to the islands 1 ­5 million years ago. Recent DNA analyses support the conclusion that all the Galápagos finches evolved from the warbler finch. How did the different beak types first arise in the Galápagos finches? A. Changes in their beak size and shape occurred because of the finches’ need to be able to eat different kinds of food to survive....
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