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AnewcomparisonofDNAfr"的相关试题:
[简答题]PassageA
AnewcomparisonofDNAfrommoderncaninesandancientfossilssuggeststhattoday’spetsaredescendedfromnow‐extinctpopulationsofwolvesinEurope.Theylikelyscavengedbonesfromscrappilesleftbehindbyhunter‐gatherers,sayresearchersintoday’sissueofthejournalScience.
Andtheboldertheanimalsgot,themorefoodtheytook,andthemoreloyaltheybecametohumans,theysay,addingthisprocessofdomesticationlikelybeganasmanyas19,000to32,000yearsago."AllmoderndogshaveaverycloserelationshiptoancientdogsorwolvesfromEurope,"saysleadauthorDr.OlafThalmann,fromtheUniversityofTurkuinFinland.
TheteamanalysedthemitochondrialDNAof18prehistoriccanines—eightdogsand10wolves—andcomparedthistoDNAfromacomprehensivepanelof49wolvesand77dogs,includingBasenjiandDingo,threerecentlypublishedChineseindigenousdogsandfourcoyotes.
TheancientsamplescamefromRussia,Ukraine,CentralEurope,theUnitedStatesandArgentina,saysThalmann.Someweremorethan30,000yearsold.ThemodernDNAfromdogsandwolvesspannedtheglobe,fromIsraeltoChina,Swed
A. A．It is humans who have initially attempted to approach the wolf and ancient dogs.
B．The ancient dogs or wolves that tended to approach humans took the sustainable evolution process.
C．Initially, it is wolves that took the lead when it came to befriending humans because of the lacking in food source.
D．Those wolves which dared to get closer to human camps have an evolutionary advantage over others which did not.
[单项选择]What is the main idea of the passageA. Light colors make people feel more cheerful.B. Colors can influence people’s moods.C. Dark colors make people feel sad.
[单项选择]Human’s HandsWhat is the main idea of the passage
A. Human ancestors became predominantly right- handed when they began to use tools.
B. It is difficult to interpret the significance of anthropological evidence concerning tool use,
C. Human and their ancestors have been predominantly right -handed for over a million years.
D. Human ancestors were more skilled at using both hands than modem humans.
