<prompt> Ngokuvamile umoya-mpilo uvela? Njengoba kunikezwe umbuzo odlule, bhala umongo onempendulo yawo. Kungaba imisho engu-1 kuya kwengu-20. Umongo:  <response>: I-singlet oxygen yigama elinikezwe izinhlobo eziningana zamandla aphakeme e-molecule O2 lapho wonke ama-electron spin ahlanganiswe khona. Iphendula kakhulu kuma-molecule avamile e-organic kunomoya-mpilo we-molecule uqobo. Emvelweni, ngokuvamile i-oxygen ivela emanzini ngesikhathi se-photosynthesis, kusetshenziswa amandla okukhanya kwelanga. Iphinde ikhiqizwe e-troposphere nge-photolysis ye-ozone ngokukhanya kwamaza amafushane, nangesimiso somzimba sokuzivikela njengomthombo womoya-mpilo osebenzayo. Ama-carotenoid ezinhlotsheni eziphilayo ezenza i-photosynthesis futhi mhlawumbe nasezilwaneni adlala indima enkulu ekufuneni amandla avela ku-oxygen we-singlet futhi awuguqulele esimweni esiyisisekelo ngaphambi kokuba angalimaza izicubu. 