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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.ispartialbutcomplementarytotheprevioushypothesis.
B.isnotscientificbecausetheresearchmethodologyisproblematic
C.stronglychallengesthe“OutofsouthChina”schemeofdoghistory.
D.isnotconvincing,evenridiculoussinceitoverlookssamplesfromChinaandtheMiddleEast.
[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.
[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.