Sida caadiga ah marka makhluuqa uu leeyahay magac tilmaamaya 'aan dhiman', had iyo jeer waxaa loo fasiraa si aan macno lahayn. Laakiin tani maahan arrin ku saabsan xeerarka noolaha ee jellyfish-kan. Jellyfish-kan, oo loo yaqaan Turritopsis nutricula , si fudud uma dhiman karo sababo dabiici ah. Awoodeeda dib-u-soo-nooleynta aad ayey u sareysaa oo waxay dhiman kartaa oo keliya haddii gebi ahaanba la burburiyo.

Sida ugu badan ee jellyfish, waxay soo martaa laba marxaladood: marxaladda polyp, ama marxaladda aan qaan-gaarin, iyo marxaladda medusa , taas oo ay awood u leedahay. si aan jinsi ahayn u taran. Jellyfish-ka aan dhiman karin waxa si kadis ah u helay arday Jarmal ah oo barta cilmiga bayoolajiga badda Christian Sommer sannadkii 1988-kii isaga oo fasaxiisa xagaaga ku qaadanayay Riviera Talyaaniga. Sommer, oo ururiyay noocyada hydrozoans si ay daraasad u sameeyaan, ayaa ku dhammeeyey qabashada makhluuqa yar ee dahsoon, wuxuuna la yaabay waxa uu ku arkay shaybaarka. Ka dib markii uu baaray dhowr maalmood, Sommer wuxuu xaqiiqsaday in jellyfish uu si fudud u diiday inuu dhinto, isagoo dib ugu laabanaya xaaladdiisii ​​hore ee koritaankiisa ilaa uu dib u bilaabayo meertada nolosheeda mar kale, si isdaba joog ah, sida haddii uu ku socdo gabow kale.

Cilmi-baarayaasha. waxay hore u ogaadeen inay bilaabato dib u soo kabashadiisa cajiibka ah marka ay ku jirto xaalad walaac ama weerar, iyo in mudadan uu nooluhu maraayo habka loo yaqaan transdifferentiation.unug, taas oo ah, dhacdo aan caadi ahayn oo nooc ka mid ah unuggu isu beddelo mid kale, sida ku dhacda unugyada asliga ee aadanaha. Dabeecadda ayaa mar kale naga yaabisay, ina tusinaysa awoodda weyn ee ay u leedahay hal-abuurnimada marka loo eego dhibaatooyinka dabiiciga ah iyo kuwa ay dadku sameeyeen. Eeg xog-waraysi si fiican u sharraxaysa wareeggaaga:

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