Unuggu waa unugga qaab-dhismeedka iyo shaqada ee nolosha, halka hidde-sidaha uu yahay unugga dhaxalka. Unugyada prokaryotic iyo eukaryotic labaduba waxay ka kooban yihiin cytoplasm oo ku duuban xuub waxayna ka kooban yihiin noocyo kala duwan oo biomolecules ah, oo ay ku jiraan borotiinno iyo asiidhyada nucleic. Qaybinta unugyadu waa habka ay unugyadu u tarmaan. Inta lagu jiro hawshan, unugga waalidku waxa uu u kala baxaa laba unug ama in ka badan oo unugyo gabdho ah, iyaga oo u gudbiya hiddo-wadeyaashiisa farcanka, mararka qaarkoodna waxa keena kala duwanaansho hidde-side ah.
Guud ahaan, waxa la rumaysan yahay in noolaha, ama qaybaha gaarka ah ee nolosha, ay yihiin nidaamyo furan oo ilaaliya homeostasis, ka samaysan unugyo, maraan meerto nololeed, qabtaan dheef-shiid kiimikaad, awoodna u leh inay koraan, la qabsadaan agagaarkooda. ka jawaab celinta kicinta, soo saarista, iyo kobcinta qarniyo badan. Noocyada noolaha aan unugga ahayn sida fayrasyada iyo fayrasyada ayaa mararka qaarkood lagu daraa qeexitaanno kale, laakiin caadi ahaan maahan mar haddii aysan si madax-bannaan u dhaqmin; halkii, waxay ugaadhsadaan hababka noolaha ee martida loo yahay.
Abiogenesis, oo sida caadiga ah loogu yeero asalka nolosha, waa habka ay noloshu si kedis ah uga soo baxdo maaddooyinka aan noolayn, sida xeryahooda organic fudud. Marka la eego cabbirka wakhtiga juqraafiga, nolosha dunidu waxa ay beddeshay agagaarkeeda tan iyo markii la aasaasay, haddana waxa ay sidoo kale u kobcisay in ay ka jirto inta badan hababka deegaanka iyo xaaladaha. Xulashada dabiiciga ah iyo noocyada hidde-sidaha ayaa horseeday horumarinta qaab nololeedka cusub ee awoowayaasha la wadaago.
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