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Unit4Exploringplants Readingtask课件 Co Evolution yucca丝兰 yuccamoth TheTraveller sPalm棕榈树 TheMadagascarblacklemur TheOphrysOrchid兰花 wasp Warmingup Discussthequestion What stherelationshipbetweenplantsandanimals Pre reading Beforeyoureadthetext glancequicklythroughitandanswerthesequestions 1 What sthetopicofthetext 2 Whatthreeplantsarefeatured 3 Whatdothephotosshowyou 4 Whatthreeanimalpollinatorsarefeatured What sthetopicofthetext 2 Whatthreeplantsarefeatured Co evolution Theyucca theTraveller sPalm andtheOphrysorchid 3 Whatdothephotosshowyou 4 Whatthreeanimalpollinatorsarefeatured Yuccaflowers aTraveller sPalm andanOphrysorchid Theyuccamoth theMadagascarblacklemur acertainkindofwasp themale notthefemalewasp Firstreading Nowreadthetextmorecarefullyandanswerthesequestions Whycannootheranimalsbuttheyuccamothpollinatetheyucca It sonlytheyuccamothwhichistherightsizeandshapetopollinatetheyucca 2 CanyouguesswhytheTraveller sPalmhasthatname TheTraveller sPalmhasthisnamebecausetravellersusedtodrinkitsnectarwhentheywerethirsty 3 Whatdoyouthink sweettooth means Ifapersonorananimalhasa sweettooth theylikesweetfoodverymuch 4 Whydothemalewaspstrytomatewiththeorchidflowers Themalewaspstrytomatewiththeorchidflowersbecausetheylooklikeandsmelllikefemalewasps 5 Whydothefemalewaspsvisittheorchidflowers Dotheyhavearoleinpollination Thefemalewaspsvisittheorchidflowerstocollectthechemicalthatthemalewaspswereattractedtoearlier Thefemalewaspsdonothavearoleinpollinationsincetheflowersaredyingwhentheyvisitthem Secondreading Nowreadandthinkabouttheadvantagesanddisadvantagesoftherelationshipsbetweentheplantsandpollinationsdescribedinthetext Checkyourunderstandingandcompletethetable Theyuccaiscertaintobepollinated Themoth scaterpillarshaveacertainsupplyoffood Theyaretotallydependentoneachotherforsurvival Thepalm sflowercanbeopenedbythelemur Thelemurhasasourceoffood Thereisadisadvantageforthepalmonlyiftherearenolemursorotheranimalspresentstrongenoughtoopentheflowers Theorchidiscertaintobepollinated Theyaretotallydependentoneachotherforsurvival Thefemalewaspscollectachemicalfromtheorchidneededtoattractthemalestothem Discussion Discusswhatyouthinkwouldhappentotheanimalpollinatorsofeachoftheplantsdescribediftheseplantsdiedout Suggestedanswers Theyuccaandtheyuccamoth Ifyuccaplantsdiedout theYuccamothwouldalsodieoutasthecaterpillarsneedtheyuccaseedsforfood TheTraveller spalmandtheMadagascarblacklemur IftheTraveller spalmdiedout theMadagascarblacklemurwouldnotdieoutasitcanfindothersourcesoffood TheOphrysorchidandthew
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