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biology - B Over the past several decades natural selection...

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Unformatted text preview: B} Over the past several decades. natural selection has caused populations of Stepfylosoozus aureus {an infectious wound bacterium] to evolve resistance to mosl antibiotics. It anlibiotic use were slop ped. what would you predict would happen to these S. aireus populations? A] The populationswill begin colonizing new environments. B} The frequency of resistant form swill definitely increase in these populations. C} The frequency of nonresistant formswill increase in these populations. D} They will go extinct without thesntibiotic. 9} According to some researchers. environmentsall over the world are changing asaresult of global warming. If this istrue. could this influence natural selection? A] Yes. Mutations occur more frequently in hot environments. B} No. The only change will be that speciesfrom hot environmentswill expand their ranges. C} 1'l‘es.Traitsthat help individuals produce more offspring in warmer environments will increase infrequency. D] No. The environment is alwayschanging. Global warming is nothing new. 10} The 'heat' in chili peppers is dueto amolecule called cap ssl'cin. Suppose you breed chili peppers that have low amounts of capssl'cin over many generations in order to melee them milder {have less cassaicin}. What process is occurring? A} heritable variation B) environmental change 0} artificial selection D) natural selection 11} The 'heat' in chili peppers is duetoa moleculecalled capsaicin. Suppose you breed only the hottest chili peppers over many generations. predict the characteristics of the resulting individuals. A] smallerfruits B] largerfruits C] more cmsaicin D] lesscapssl'cin 12} Starting from the wild mustard Elras-sicaderaaa breeders have created the strains know h as Bru ssel sprouts. broccoli. kale. and cabbage. W hich of the following statementsis supported by this observation '3' A} In this species. most of the variation present isdue to differences in soil. nutrition. amount of sunlight. or other aspects of the environment. B] In this species. there isenough heritable variation to createavariety of features. G} Naural selection has not occurred very frequently in the wild populations. D} H eritable variation is low—otherwise the wild strain would have different charazteristics. 13} Many phylogenetictrees are based on DNA sequence similarities. What is the praztical result of this similarity? A] Species with very similar DNA will have similar structures. enzymes. and appearance. B] Mitochondrial DNA might be differentfrom nuclear DNA. G} Artificial selection can bring closely related species even closer to each other. D} Closely related specieswill not look similar to each other. 14} In the Linnman classification system. which taxon would generally include the largest number of species"? A} family B} genus G) order D] phylum 15} Ill'llhy did the fiye— kingdom system of classification fall out of favor? A] ltwastoo difficult todistinguish plants from fungi and animalsfrom protistans. B} There were too few moneransto justify their classification a the kingdom level. C} It did not reflect the siztual evolutionary relation shipsslnong organismsvery well. D} ltwastoo complex—theoriginal two—kingdom system of Linnmuswas more useful. 5} 9} 1c} 11} 12} 1a} 14} 15} ...
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