Izinja, mhlawumbi, zona ziyimfihlelo kwiindawo zesayensi zembono. Inyaniso kukuba iinqununu eziliqela ezivela kwimvelaphi yazo iinjongo zesayensi. Musa ukuyibuza ukuba inja isilwanyana esisilwanyana esilumkileyo se-vertebral substlass. Yingumyalelo wezilwanyana ezidliwayo, intsapho yezinja, intsapho yezinja kunye nokubona kweenja zasekhaya.
Ziziphi iingcamango zemvelaphi yezinja?
Kuza kube yimhla, imbali yemvelaphi yezinja isondelelene neengcuka, izimpungushe, izinja ze-dingo zase-Australia kunye ne-coyotes. Ngoko, izazinzulu zichaza imvelaphi yenja yasekhaya ngeengcamango ezimbini. Ngokweyokuqala, yile inzala yemvu (oku kwaye kwakuboniswa nguCharles Darwin), kunye nabalandeli be-theory yesibili bona izinja zibangelwa ukuwela izimpungushe, iingcuka kunye nezimpungushe. Kungekudala, inkolelo yesithathu, uKarl Linnaeus eyaphambili, yafumana ilungelo lokuphila. Izifundo zokugqibela zofuzo ziqinisekisa ngokungqalileyo ukuba izimpungushe kunye nezimpisi zangexesha elidlulileyo zinekhokho oqhelekileyo, owayekalala.
Kuye kwaziwa ngokuqinisekileyo ukuba kwiBronze Age ukuhlelwa kwezinja zasekhaya kwakuquka iintlobo ezintlanu:
- Masti;
- i-grayrey (i-grayrey);
- izinja zeengcuka;
- izinja zomalusi;
- izinja ezinjengeenjongo.
Ukuqwalasela imvelaphi yeentlobo zeenja, abaphandi bafika kwisigqibo sokuthi babonakala ngenxa yokuhlalisa nokuzaliswa kwezi zilwanyana. Namhlanje, iintlobo ezikhoyo zezinja zahlula zibe ngamaqela amakhulu amathathu: ukuzingela, inkonzo, ngaphakathi kunye nokuhlobisa. Uhlobo oluthile lububungqina bokukhethwa okujoliswe kuyo kunye nokuqinileyo, esivumelwaneni esipheleleyo kunye nendlela okhokho bethu bamandulo balwela ngayo ithuba lokuba khona.
Kungakhathaliseki ukuba yintoni, inja, ubungqina bokuba kukho iminyaka eyi-25-30 yezigidi, kuye kwaye kwahlala ibe ngumhlobo othembekileyo kunye nomncedisi wabantu.