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考研英语作文：Plankton浮游生物.docx

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考研英语作文：Plankton浮游生物考研英语作文：Plankton浮游生物在生活、工作和学习中，大家都尝试过写作文吧，作文是一种言语活动，具有高度的综合性和创造性。你所见过的'作文是什么样的呢？下面是小编整理的考研英语作文：Plankton浮游生物，供大家参考借鉴，希望可以帮助到有需要的朋友。scatteredthroughtheseasoftheworldarebillionsoftonsofsmallplantsandanimalscalledplankton.mostoftheseplantsandanimalsaretoosmallforthehumaneyetosee.theydriftaboutlazilywiththecurrents,providingabasicfoodformanylargeranimals.planktonhasbeendescribedastheequivalentofthegrassesthatgrowonthedrylandcontinents,andthecomparisonisanappropriateone.inpotentialfoodvalue,however,planktonfaroutweighsthatofthelandgrasses.onescientisthasestimatedthatwhilegrassesoftheworldproduceabout49billiontonsofvaluablecarbohydrateseachyear,theseasplanktongeneratesmorethantwiceasmuch.despiteitsenormousfoodpotential,littleeffectwasmadeuntilrecentlytofarmplanktonaswefarmgrassesonland.nowmarinescientistshaveatlastbeguntostudythispossibility,especiallyastheseasresourcesloomevenmoreimportantasameansoffeedinganepandingworldpopulation.nooneyethasseriouslysuggestedthatplankton-burgersmaysoonbecomepopulararoundtheworld.asapossiblefarmedsupplementaryfoodsource,however,planktonisgainingconsiderableinterestamongmarinescientists.onetypeofplanktonthatseemstohavegreatharvestpossibilitiesisatinyshrimp-likecreaturecalledkrill.growingtotwoorthreeincheslong,krillprovidesthemajorfoodforthegreatbluewhale,thelargestanimaltoeverinhabittheearth.realizingthatthiswhalemaygrowto100feetandweigh150tonsatmaturity,itisnotsurprisingthateachonedevoursmorethanonetonofkrilldaily.