Mene ne shaida juyin halitta

Game da asalin duniya mai yawa versions. Zai yiwu daya daga cikin mafi m m Darwin ya yi cikin sanannen rubuce-rubucen. Ya dogara da data kasance shaida ga juyin halitta, wadda bayan yawa sau diddigin kuma tabbatar. Facts wanda ya nuna cigaba da kwayoyin duniya, ya shawo isasshen kuma bambancin. Suna jayayya da cewa duk rayuwa a duniya ya zo daga pre-data kasance jinsunan da kwayoyin canje-canje.

Sosai da ci gaba na dabbobi da wasu shuke-shuke, da ke rubuce a daftarin burbushin halittu, bauta wa daya daga cikin hanyoyin tabbatar da irin yadda duk abin da raya. Bugu da kari, wannan "daftarin burbushin halittu" ba ka damar mayar da mutum aka gyara na phylogeny. Wadannan ma'aunan - shi ne ba kawai da hakora, kasusuwa ko wasu m sassan shuke-shuke ko kuma dabbobi da cewa sun tsira, shi ne kuma wani burbushi ko alamar yatsa, wanda bar preexisting kwayoyin. Dole ne in ce cewa a halin yanzu, bude kawai karamin sashi na abin da rai siffofin wanzu a wannan duniyar tamu kafin. Ci gaba da gudanar da bincike da kuma saka idanu wadannan burbushin halittu, masana kimiyya da hannu a cikin tarin da kuma fassarar data game da tsoho kwayoyin.

Ba dole ne a ce cewa abin shaida na juyin halitta daga mai rai yanayi ya kasu kashi da dama kungiyoyin. Saboda haka, akwai shaida cewa dogara ne a kan hadin kai na asalin da kwayoyin duniya. Wadannan sun hada da cewa kusan dukkan kwayoyin da irin wannan elemental sinadaran abun da ke ciki. Da muhimmanci sosai a m mamaki a cikin dabbobi da kwayoyin cuta, da kuma shuka sunadarai, da kuma nucleic acid gina ko da yaushe na kama aka gyara. Salula tsarin ne kusan duk kwayoyin. Kamar yadda kwayoyin na tara makamashi, ATP amfani.

Cikin gida da kuma kasashen waje masana kimiyya sun sami shaida ga juyin halitta, sanye mahaifa hali. A sakamakon a-zurfin nazari na kwayar dabbobi a cikin jariri akwai gagarumin kamance. Musamman a fili gani guda ãyõyi a tãyuna na zuwa wannan aji ko irin. Alal misali, a cikin terrestrial vertabrate Notes kwanciya gill arches kazalika a kifi, ko da yake manya, su ba su da aikin muhimmanci. Wannan ya nuna cewa duk wani abu mai rai da na kowa asalin. By da bayyananen juyin halittar mutum, kuma sun hada da rudimentary, watau undeveloped sassa ko gabobin jiki. Mafi na kowa daga wadannan sun hada da coccyx, wanda shi ne mai triangular kashi ne kafa da dama Fused vertebrae. Da zarar shi Forms da wutsiya, duk da haka, ta miƙa mulki ga tafiya da kafa biyu bukatar for shi bace. A sakamakon wannan sashin jiki a cikin mutane shi ne a cikin tasowa, amma ta wurin tabbatar da ka'idar juyin halitta.

Har ila yau, na lura shi ne wani atavism. Yana nufin bayyanar da wasu irin hali da cewa shi ne halayyar na kakanninsu, amma kullum da shi kada ta kasance ba, a wannan zamani suke. Alal misali, wannan yana iya zama wani karfi hairiness, gaban fiye da daya biyu daga mammary gland da kuma kama. D.

Bikin da morphological shaida ga juyin halitta. Daga cikin su da wani musamman da darajar ne siffofin da hada siffofin da manyan-din-din raka'a. Bugu da kari, masana kimiyya ya lura cewa wasu vertabrate da gaske kama da tsarin da gaban wata gabar jiki, duk da cewa suna da daban-daban ayyuka.

Dũkiya na kimiyya abu don nazarin juyin halitta bayar da wani kwatanta daban-daban na halitta namun daji yankunan. The rarraba daban-daban iri iri da iri a kan duniya da kuma kara ra'ayoyi su bisa ga Gwargwadon yanayin fili nuna tarihi raya dukan abubuwa masu rai.