Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Hanyar da ke tattare da metabolism da aka bayyana a sama, irin su glycolysis da kuma tsarin citric acid, suna cikin dukkanin yankuna uku na abubuwa masu rai kuma sun kasance a cikin kakanninmu na karshe na duniya. Wannan kwayar kakanin duniya ta kasance prokaryotic kuma mai yiwuwa methanogen wanda ke da amino acid mai yawa, nucleotide, carbohydrate da lipid metabolism. Tsayawa na waɗannan tsoffin hanyoyi a yayin juyin halitta na baya na iya zama sakamakon waɗannan halayen sun kasance kyakkyawan mafita ga matsalolin da suka dace na rayuwa, tare da hanyoyi irin su glycolysis da kuma tsarin citric acid da ke samar da samfurori na ƙarshe sosai da kuma ƙananan matakai. Hanyoyi na farko na metabolism na tushen enzyme na iya zama ɓangarorin metabolism na purine nucleotide, yayin da hanyoyin da suka gabata na rayuwa sun kasance wani ɓangare na duniyar RNA ta dā. An gabatar da samfura da yawa don bayyana hanyoyin da sabbin hanyoyin rayuwa ke haɓaka. Waɗannan sun haɗa da ƙarin jerin sabbin enzymes zuwa gajeriyar hanyar kakanninmu, ninkawa sannan kuma bambance-bambancen hanyoyin gaba ɗaya da kuma ɗaukar enzymes da suka rigaya da haɗuwa zuwa sabon hanyar amsawa. Matsakaicin mahimmancin waɗannan hanyoyin ba shi da tabbas, amma nazarin kwayoyin halittar sun nuna cewa enzymes a cikin hanyar suna iya samun zuriya ɗaya, suna ba da shawarar cewa hanyoyi da yawa sun samo asali a cikin mataki-mataki tare da sabbin ayyuka waɗanda aka ƙirƙira daga matakan da suka gabata a cikin hanyar. Wani samfurin ya fito ne daga binciken da ke bin diddigin juyin halittar tsarin sunadarai a cikin hanyoyin sadarwa, wannan ya nuna cewa ana daukar enzymes a ko'ina, ana karɓar enzymes don yin ayyuka iri ɗaya a cikin hanyoyin metabolic daban-daban (bayyane a cikin bayanan MANET) Waɗannan hanyoyin daukar ma'aikata suna haifar da mosaic na enzymatic na juyin halitta. Halin na uku shine cewa wasu sassan metabolism na iya wanzu a matsayin "modules" wanda za'a iya sake amfani da su a hanyoyi daban-daban kuma suna yin ayyuka iri ɗaya a kan kwayoyin daban-daban.  Tambaya: Mene ne ƙwayoyin kakannin duniya?
ƙwayoyin cuta