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1、Copyright©2008PearsonEducation,Inc.,publishingasPearsonBenjaminCummingsPowerPoint®LecturePresentationsforBiologyEighthEditionNeilCampbellandJaneReeceLecturesbyChrisRomero,updatedbyErinBarleywithcontributionsfromJoanSharpChapter32AnIntroductiontoAnimalDiversityCopyright©200
2、8PearsonEducation,Inc.,publishingasPearsonBenjaminCummingsOverview:WelcometoYourKingdom•Theanimalkingdomextendsfarbeyondhumansandotheranimalswemayencounter•1.3millionlivingspeciesofanimalshavebeenidentifiedVideo:CoralReefFig.32-1Copyright©2008PearsonEducation,Inc.,publishi
3、ngasPearsonBenjaminCummings•Thereareexceptionstonearlyeverycriterionfordistinguishinganimalsfromotherlife-forms•Severalcharacteristics,takentogether,sufficientlydefinethegroupConcept32.1:Animalaremulticellular,heterotrophiceukaryoteswithtissuesthatdevelopfromembryoniclayer
4、sCopyright©2008PearsonEducation,Inc.,publishingasPearsonBenjaminCummingsNutritionalMode•AnimalsareheterotrophsthatingesttheirfoodCopyright©2008PearsonEducation,Inc.,publishingasPearsonBenjaminCummingsCellStructureandSpecialization•Animalsaremulticellulareukaryotes•Theircel
5、lslackcellwalls•Theirbodiesareheldtogetherbystructuralproteinssuchascollagen•NervoustissueandmuscletissueareuniquetoanimalsCopyright©2008PearsonEducation,Inc.,publishingasPearsonBenjaminCummingsReproductionandDevelopment•Mostanimalsreproducesexually,withthediploidstageusua
6、llydominatingthelifecycle•Afteraspermfertilizesanegg,thezygoteundergoesrapidcelldivisioncalledcleavage•Cleavageleadstoformationofablastula•Theblastulaundergoesgastrulation,formingagastrulawithdifferentlayersofembryonictissuesVideo:SeaUrchinEmbryonicDevelopmentFig.32-2-1Zyg
7、oteCleavageEight-cellstageFig.32-2-2ZygoteCleavageEight-cellstageCleavageBlastulaBlastocoelCrosssectionofblastulaFig.32-2-3ZygoteCleavageEight-cellstageCleavageBlastulaBlastocoelCrosssectionofblastulaGastrulationBlastoporeGastrulaArchenteronEndodermEctodermBlastocoelCopyri
8、ght©2008PearsonEducation,Inc.,publishingasPearsonBenjaminCummings•Manyanimalshaveatleasto