Izinja, mhlawumbe, eziyimfihlakalo kakhulu kunombono wesayensi wezilwane. Iqiniso liwukuthi emakhulwini amaningi eminyaka imvelaphi yabo iyisihloko sezingxabano zesayensi. Ungangabazi ukuthi inja iyilungiselwano le-vertebral elilondayo le-subclass ye-placental. Kungokwemigomo yezilwane zasendle, umndeni wezinja, umndeni wezinja kanye nokubona izinja ezifuywayo.
Yiziphi izinkolelo zemvelaphi yezinja?
Kuze kube manje, umlando wemvelaphi yezinja uhlobene eduze nezimpisi, izimpungushe, izinja ze-dingo zase-Australia kanye ne-coyotes. Ngakho-ke, ososayensi bachaza imvelaphi yenja yasekhaya ngemibono emibili. Ngokusho kokuqala, yiyo inzalo yempisi (lokhu kwakuboniswa noCharles Darwin), futhi abalandeli be-theory yesibili babona izinja ngenxa yokuwela izimpungushe, izimpisi nezimpungushe. Muva nje, inkolelo yesithathu, uKarl Linnaeus ayenayo, nayo yathola ilungelo lokuphila. Ucwaningo lwamuva lwezakhi zofuzo luqinisekisa ngokuqondile ukuthi izimpungushe nezimpisi zasendulo zinekhokho ovamile, okwadlula.
Ngokuqinisekile kwaziwa ukuthi e-Bronze Age ukuhlukaniswa kwezinja ezifuywayo kwakuhlanganisa izinhlobo ezinhlanu:
- Amasosha;
- ama-greyhounds (ama-greyhounds);
- izinja eziyizimpisi;
- izinja zomalusi;
- izinja ezinjenge-pointer.
Ngokucabangela imvelaphi yezinja zezinja, abacwaningi bafika ekuphethweni ukuthi babonakala ngenxa yokuzaliswa kwezilwane kanye nokuzaliswa kwezilwane. Namuhla, izinhlobo zezinja ezikhona zihlukaniswe ngamaqembu amakhulu amathathu: ukuzingela, service, endlini kanye nokuhlobisa. Izinhlobonhlobo ziwubufakazi bokukhethwa okuhloswe futhi okunzima, okuvumelana ngokuvumelana nendlela okhokho bethu basendulo balwela ngayo ukuba khona.
Kungakhathaliseki ukuthi kwakunjani, inja, ubufakazi bokuthi kukhona khona iminyaka engama-25-30 wezigidi, uye waba futhi umngane onokwethenjelwa nomsizi wabantu.