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Biology chapter 3-7.docx

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Department
Biology
Course
Biology 1202B
Professor
All Professors
Semester
Fall

Description
Chapter3defininglifeanditsoriginsWhatislifeTypesofelementsandatomsfoundinlivingthingsarealsofoundinnonlivingthingslivingnonlivingthingshavesamefundamentallawsofphysicsexbiochemreactionsoflivingcellsarereactionsthattakeplaceoutsidethecellNOTEcelltheoryAllorganismscomposedofoneormorecells2Thecellisthesmallestunitthathasallthepropertiesoflife3Cellsariseonlyfromthegrowthanddivisionofpreexistingcells7characteristicssharedbyalllifeformsSwansOnlyEatHayEarlyGrownRightSstimuliOrganismscanmakechangestotheirstructurebehaviorandfunctioninresponsetothechangeintheirenvironmentOorderAllformsoflifearearrangedwithaspecificcellorderEenergyuseAllformsoflifeacquireenergyanduseittomaintaintheirorderHhomeostasisOrganismscanregulatetheirinternalenvironmentEevolutionOrganismschangeovetimeinordertoadapttotheirenvironmentGgrowthAllorganismsincreasetheirsizebyinceasingtheirnumberofcellsovertimeRreproductionAllorganismshavetheabilitytomakemoreoftheirownkindVirusesstraddlingthelinebetweenlivingandnonlivingbecausetheyreproduceandevolveovertimebuttheycantreproducealonetheyhavetohijacklivingcellssosomescientistsconsiterthemnonlivingCharacteristicsareemergentMeansthattheyemergefromsimplerprocessesExTheabilitytotakeinandproduceenergydoesnthappenbecauseofonesinglebunchofmoleculesithappensusingmoleculesandproteinsandmembranesExCathedraltermitenestemergesfromthesimpleworkofthousandsoftermitesputtogetherpicturepg53ThechemicaloriginsoflifeAllcellscomefrompreexistingcellsbuttherehadtobeatimewhenlifestartedTounderstandthatweneedtofindoutwhenhowthesolarsystemcameupPanspermiatheideathatAsteroidsandcometscouldhavebroughtorganicmattertoEarthALH84001wasanasteroidwhosOriginwasplanetMarsPolycyclicaromatichydrocarbonsFormedwhenmicroorganismsdieBacteriallikestructuresEarthformed46billionyearsagotimelinepicturepg5354Universeformed15billionyearsagoBigBangGalaxiesformedfromstarsdustandgasOldestFossils35billionyearsagoEukaryoticfossils22billionyearsagoSpontaneousregenerationfirstcellsarosewheretherehadbeennolifebeforeExperimentopenbeackerwithbrothclosedbeakerWhenheclosedofftheairitdidntspoilbutwhenhedidntcloseitoffitspoiledwhichprovestousthatthingsgrowfromotherthingsinourairbutthewholepointisthatlifeintheairmustveoriginatedfromsomewhereEarthorbitsaroundthesunAllcomponentsofthesolarsystemwereformedatthesametimeThesunwasformedbyintenseheatandpressuregeneratedinthemiddleofaninterstellarcloudTheleftoverdustfromthecloudformedthesolarsystemandthestarsEarthtookanestimated500millionyearstocoolbeforeitcouldsupportlifeEarthistheonlyplanetthatcansupportlifebecauseearthisinapositionwheretheheatfromthesunallowswatertoexistinliquidformFoundwateronmarsthereforelifecouldpotentiallyhavelivedthereweknowthisbecauseofthehabitablezonetheareaaroundastarwherewatercanexistinaliquidstatemarsisveryclosetothatregionchartpage55BiologicallyimportantmoleculesMajormacromoleculesnucleicacidsproteinslipidscarbohydratesThesewereallderivedfromsimplermoleculesexceptforlipidssuchasnucleotidessugarsandaminoacidsEarlyatmosphere
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