Yaushe tsiron farko ya bayyana?

Mutane, kamar yadda muke yanzu, sun kasance a Duniya kusan shekaru dubu goma. Amma lokacin da kakanninmu suka bayyana, tsakanin shekaru miliyan 5 zuwa 7 da suka gabata, dabbobi da tsirrai da yawa sun mallaki duniyar.

Ba yawanci muke tunani game da shi da yawa ba, amma da ba don su ba, ga halittu masu rai, rayuwa kamar yadda muka san hakan ba za ta wanzu ba, saboda haka yana da mahimmanci sanin su don kare su. Kuma wannan shine ainihin abin da zamu yi gaba: kara sanin su kadan, gano lokacin da tsirrai na farko suka bayyana. Kun shiga? 😉

Yaushe tsiron farko ya bayyana?

Kodayake a yau akwai tsire-tsire a cikin tekuna da cikin ɓawon ƙasa, kimanin shekaru miliyan 4.000 da suka gabata yanayin ya bambanta sosai.. Kwayoyin halittun da suke wanzuwa a yau sun samo asali ne daga kwayoyin da chlorophyll ya tashi daga gare su, saboda godiyar da zasu iya canza hasken rana zuwa abinci (galibi sugars) daga ruwa da carbon dioxide a sararin samaniya.

Sabili da haka, ƙwayoyin farko sun sami damar yin kaurin membrane ɗinsu, wanda ya taimaka musu wajen tara ajiyar abinci. Ba da daɗewa ba bayan haka, ƙananan ƙwayoyin cuta na farko suka fito, wanda dukkan tsire-tsire waɗanda suke zaune a ciki kuma suke zaune a duniya za su sauko cikin tsawon miliyoyin shekaru.

Menene tarihin juyin halitta na tsirrai?

Cooksoniya

A matsayinka na shaci, muna fada maka tarihin juyin halittar halittu masu shuke-shuke:

• Shekaru biliyan 3.500 da suka gabata: mosses ya fito, waɗanda sune tsire-tsire na farko da suka bar muhalli.
• Kimanin shekaru miliyan 470 da suka gabata: itacen farko na jijiyoyin jini ya bayyana, wanda ake kira Cooksonia. Ba ta da ganye ko furanni, amma ƙafafun na iya ɗaukar hoto.
• Kimanin shekaru biliyan 370 da suka gabata: tsire-tsire na farko sun bayyana motsa jiki, daya daga cikin farkon shine Elkinsia polymorpha.
  • Shekaru miliyan 300 da suka gabata: conifers sun bayyana.
  • Shekaru miliyan 270 da suka gabata: cycas da kuma Ginkgo bayyana su.
  • Shekaru miliyan 200 da suka gabata: ferns sun fara rayuwa.
• Kimanin shekaru biliyan 150 da suka gabata: shuke-shuke da furanni masu ban sha'awa, angiosperms.

Shin ya ban sha'awa a gare ku? 🙂