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时间:2020-09-20
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1、ClassificationofAnimalsAnimalsWithBackbonesMAMMALFISHREPTILEBIRDAMPHIBIANAnimalswithbackbonesarecalledvertebrates.Vertebratesincludemanydifferentkindsofanimals.Theycanbefoundjustabouteverywhere–inoceans,rivers,forests,mountains,anddeserts.Animalswithbackbonescanbebrokenupintosmallergroupsby
2、characteristics.Theyare:AnimalsWithBackbonesFishFishCharacteristicsTheyarethelargestgroupofvertebrates.Theycomeinmanysizesandshapes.Manyfisharecoveredwithscalesthatprotectsthem.Theyhavefinsthathelpthemtosteerandbalanceinthewater.Theirbodytemperaturesvaryinthewater.Theybreathethroughgills.Am
3、phibiansAmphibianCharacteristicsTheirbodytemperaturevarieswiththeirsurroundings.Amphibianshatchfromeggsandtheycanliveonlandasanadult.Youngamphibiansbreathethroughgillslikefish.Adultamphibiansbreatheairfromlungs.Somehavesmoothmoistskin.ReptilesReptileCharacteristicsReptilescanmoveatvarioussp
4、eeds.Theylaytheireggsonland.Theyhavedryscalyskin.Theycanincludeanimalsaslargeasacrocodile.Theirbodytemperaturevarieswiththeirenvironment.Theyliveinhot,drydesertsandinwarm,wettropicalrainforests.BirdsBirdCharacteristicsBirdslayhardshelledeggsthathatchintheirnest.Thereareabout9,000typesofbird
5、s.Birdsarevertebratesthathavewingsandtheyarecoveredwithfeathers.Nootheranimalhasthisfeature.Thebird’sskeletonisverylightinweight.Thishelpsthemtofly.Birdsrangeinsizefromassmallasyourfingeroraslargeasahuman.MammalsMammalCharacteristicsTheyincludeawiderangeofanimals:ape,lions,kangaroos,bats,an
6、detc.Theiryounggrowsinsidethemother.Humansaremammalsbutthey(animals)havemorehairthanwedo.Thehairkeepstheanimalswarm.Theyfeedmilktotheiryoung.InvertebratesInvertebrateClassificationWhatisanInvertebrate?Invertebratesareanimalsthatdonothavebackbones.97%oftheanimalkingdomismadeupofinvertebrates
7、.Somecanbefoundinponds,oceans,andotherwaterenvironments.Insectsandsomeotherinvertebrateshaveexoskeletons.AnExoskeletonisahardoutercoveringthatprotectsananimal’sbodyandgivesitsupport.Therearesixgroupsofinvertebrates.Theyare:SpongesSpongesCharacterist
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