Xilligee bay bakteeriyadu markii ugu horreysay ka soo baxday dhulka?
Xilligee bay bakteeriyadu markii ugu horreysay ka soo baxday dhulka?
Anonim

Ku dhow dhamaadka kan xilli, qiyaastii 2.7 ilaa 2.9 bilyan sano ka hor, sida laga soo xigtay Blank, stromatolites, noolaha kooxda Bakteeriyada kuwaas oo isticmaala photosynthesis si ay u abuuraan tamar iyaga oo aan soo saarin oksijiinta, marka hore soo muuqday.

Sidoo kale, waa maxay xilli ay bakteeriyadu soo baxday?

Awowayaasha casriga ah bakteeriyada waxay ahaayeen unugyo unugyo unugyo ah kuwaas oo ahaa marka hore noocyada nolosha si muuqda Dhulka, qiyaastii 4 bilyan oo sano ka hor. Qiyaastii 3 bilyan oo sano, noolaha badankoodu waxay ahaayeen kuwo yar yar, iyo bakteeriyada iyo archaea waxay ahaayeen noocyada ugu badan ee nolosha.

Xagga sare ka sokow, waa maxay xilliga juqraafiyeed ee unugyadii ugu horreeyay ay kobceen? Precambrian Supereon (4.6 bilyan-544 milyan sano ka hor) waa kan marka hore qayb weyn oo ka mid ah wakhtiga juqraafiga miisaan. The marka hore nool unugyo laga yaabaa kobcay qiyaastii 4 bilyan oo sano ka hor. 1 milyan sano ka hor, marka hore unugyada badan ee eukaryotes lahaa kobcay.

Dabadeed, goorma ayaa Algae markii ugu horreysay ka soo muuqday Dhulka?

The marka hore noolaha unugyada badan ayaa la rumeysan yahay inay ahaayeen casaan algae, kaas oo soo muuqday wakhti u dhexeeya 1.4 iyo 1.2 bilyan sano ka hor. Tani waxay ahayd qiyaastii laba bilyan oo sano ka dib stromatolites marka hore soo muuqday. Sidaa darteed, in ka badan nus wakhtiga ay noloshu jirtay dhulka, waxa qabsaday noole unug keliya ah.

Noolihii ugu horeeyey ee dhulka maxay ahayd?

Stromatolites, sida kuwa la helay Adduunka Aagga Heritage ee Shark Bay, Galbeedka Australia, waxa ku jiri kara cyanobacteria, kuwaas oo ay u badan tahay Dhulka ugu horeeya sawir-qaadis noolaha. The ugu horrayn caddaynta nolosha on Dhulka ka dhex dhasha dhagaxyada ugu da'da weyn ee weli lagu ilaaliyo meeraha.

Mawduuca caan ku ah