托福tpo历史学复习:生物钟小马过河为大家准备了“托福tpo历史学复习:生物钟”,供各位备考托福的考生们参考使用,来提高自己的托福成绩!免费咨询电话:400-0123-267 BiologicalClocks ,thetimingandrhythmsofbiologicalfunctionsmustcloselymatchperiodiceventslikethesolarday,thetides,thelunarcycle,,particularlyforthedailyrhythms,,theconstantlychanginglevelsofananimal'sactivity—sleeping,feeding,moving,reproducing,metabolizing,andproducingenzymesandhormones,forexample—arewellcoordinatedwithenvironmentalrhythms,butthekeyquestioniswhethertheanimal'sscheduleisdrivenbyexternalcues,suchassunriseorsunset,,epttheideathatalleukaryotes(anismsexceptbacteriaandcertainalgae),,. Whencrayfisharekeptcontinuouslyinthedark,evenforfourtofivemonths,poundeyescontinuetoadjustonad
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