unit 4 exploring plants-reading task 课件

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1、Unit4Exploringplants-Readingtask课件Co–Evolutionyucca丝兰yuccamothTheTraveller’sPalm棕榈树TheMadagascarblacklemurTheOphrysOrchid兰花waspWarmingupDiscussthequestion:What’stherelationshipbetweenplantsandanimals?Pre-readingBeforeyoureadthetext,glancequicklythroughitandanswerthesequestions.1.What’sthetopicofth

2、etext?2.Whatthreeplantsarefeatured?3.Whatdothephotosshowyou?4.Whatthreeanimalpollinatorsarefeatured?What’sthetopicofthetext?2.Whatthreeplantsarefeatured?Co-evolution.Theyucca,theTraveller’sPalm,andtheOphrysorchid.3.Whatdothephotosshowyou?4.Whatthreeanimalpollinatorsarefeatured?Yuccaflowers,aTravel

3、ler’sPalm,andanOphrysorchid.Theyuccamoth,theMadagascarblacklemur,acertainkindofwasp(themale,notthefemalewasp).FirstreadingNowreadthetextmorecarefullyandanswerthesequestions.Whycannootheranimalsbuttheyuccamothpollinatetheyucca?It’sonlytheyuccamothwhichistherightsizeandshapetopollinatetheyucca.2.Can

4、youguesswhytheTraveller’sPalmhasthatname?TheTraveller’sPalmhasthisnamebecausetravellersusedtodrinkitsnectarwhentheywerethirsty.3.Whatdoyouthink“sweettooth”means?Ifapersonorananimalhasa“sweettooth”,theylikesweetfoodverymuch.4.Whydothemalewaspstrytomatewiththeorchidflowers?Themalewaspstrytomatewitht

5、heorchidflowersbecausetheylooklikeandsmelllikefemalewasps.5.Whydothefemalewaspsvisittheorchidflowers?Dotheyhavearoleinpollination?Thefemalewaspsvisittheorchidflowerstocollectthechemicalthatthemalewaspswereattractedtoearlier.Thefemalewaspsdonothavearoleinpollinationsincetheflowersaredyingwhentheyvi

6、sitthem.SecondreadingNowreadandthinkabouttheadvantagesanddisadvantagesoftherelationshipsbetweentheplantsandpollinationsdescribedinthetext.Checkyourunderstandingandcompletethetable.Plant/pollinatorAdvantagesDisadvantagesYuccaMothTheyuccaiscertaintobepollinated.Themoth’scaterpillarshaveacertainsuppl

7、yoffoodTheyaretotallydependentoneachotherforsurvival.Plant/pollinatorAdvantagesDisadvantagesTraveller’spalmLemurThepalm’sflowercanbeopenedbythelemur.Thelemurhasasourceoffood.Thereisadisadvantageforthepalmonlyifth