unit #6, quiz #4

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Unit #6, Quiz #4. Grade:. «grade». «subject». Subject:. «date». Date:. 1. During which period did homonids first evolve. A. tertiary. B. quaternary. C. jurassic. D. cambrian. 2. After a mass extinction the empty niches will eventually (1 to 10 million years) be filled by new - PowerPoint PPT Presentation

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Unit #6, Quiz #4Grade:gradeSubject:subjectDate:date1During which period did homonids first evolveAtertiaryBquaternaryCjurassicDcambrian2After a mass extinction the empty niches will eventually (1 to 10 million years) be filled by new species. This is calledAadaptive radiationBhomologous structuresCanalogous structuresDrepressive radiation3Approximately how old is the EarthA3.6 billion years oldB4.57 billion years oldC6,000 thousand years oldD22.589 million years old4All of the following are pre-zygotic reproductive barriers EXCEPT:Atemporal isolationBmechanical barrierChabitat isolationDhybrid breakdown5Small variations within a population, such as a bacteria's resistance to antibiotics, is called:AhomologyBgene poolsCmacroevolutionDmicroevolution6Which of the following is an example of a genetic bottleneck:AA species of darker-colored mice survive predation from owls & falcons, causing the population as a whole to shift to a darker color.BA group of migratory birds stop on an island and never leave. They cease their migration & evolve into their own species.CA group of horses with long necks randomly survive a brush fire that wipes out much of the population. These long-necked horses eventually evolve into giraffesDA trolling net scoops up an entire school of anchovies, reducing the population by a small percent.7Which of the following is the driving force behind artificial selection:ATo allow normally unsuccessful traits to propagateBTo allow the most reproductively successful traits to be propagatedCTo select ideal genetic traitsDTo allow the most successful traits to survive on their own8A group of Atlantic cod migrate to the Pacific & spread their genes to the Pacific population. When considering the Pacific population this is an example of:Agenetic immigrationBgenetic emmigrationCgenetic driftDfounder effect9The following image represents:Aanalogous structuresBhomologous structuresCcomparative embriologyDpopulation genetics

10Which of the following is not a requirement for Natural Selection:AThe trait must be improved upon during the life of the population/organismBThe trait must be heritableCDifferential reproductionDGenetic variability11Most genetic mutationsAare helpful to a speciesBare harmful to a speciesChave no effect on a speciesDgive most species super powers12The bone structure of the human arm and the bone structure of the pectoral flipper of a porpoise are very similar. This is an example ofAco-evolutionBhomologous structuresCanalogous structuresDmicroevolution13Which of the following organisms would likely be found during the Cambrian Period:Aa lampreyBan octopusCa slugDa shark.14Which of the following is the geological time that we are currently in:APleistoceneBOligoceneCPlioceneDHolocene15Zonkeys & Zorses are the offspring of zebras & horses or zebras & donkeys. These offspring are sterile, meaning they are/have...Amechanical isolationBgametic isolationCreduced hybrid fertilityDreduced hybrid viability

16Organisms that breed during different times of the year are isolated by:ABehavioral IsolationBHabitat isolationCPost-zygotic barriersDTemporal Isolation17Which of the following is NOT a factor that favors fossilization:AThe species exists in a small populationBThe organism is small and has a chitin exoskeletonCThe organism gets buried under biological snowDThe organism lived through several geological time periods18Which of the following geological periods is characterized by the growth of life zones requiring stability, such as coral reefs.ACambrianBSilurianCDevonianDTriassic19A change in allelic frequency due to random chance is the definition of:Agene flow (immigration)Bgene flow (emmigration)Cgenetic driftDfounder effect20Which of the following is UNTRUE about evolution:AAll species descend from earlier ancestral speciesBThe genetic makeup of an individual must change over timeCThe genetic makeup of a population will change over timeDIt is the accepted scientific explanation of how animals adapt and survival 21A certain species of mouse is the prey of owls. These mice range in fur color from light to dark. For whatever reason, all of the mice except for the darkest are easily spotted by the owls. Over several generations, which type of natural selection would this population of mice undergo.ADirectional selectionBDiversifying selectionCStabilizing selectionDEliminating selection