UMary Allen
Intshayelelo: Imazi yexhama elineempondo
Amaxhama aziwa ngamaxhama awo ahlukileyo, aqhelekile ngexesha lokukhwelana. Noko ke, asiyonkunzi yexhama kuphela evelisa iimpondo. Imazi yexhama, ekwaziwa ngokuba yenza, iyakwazi ukukhulisa iimpondo, nangona oku kunqabile kakhulu. Isenzeko semazi yexhama elineempondo kudala inomdla kwiingcali zebhayoloji, kwaye kuninzi ekufuneka kufundwe malunga nenjongo yendaleko yezi zakhiwo.
Ukuvela kweempondo kwiDeer
Iimpondo, ezenziwe ngethambo kwaye zigqunywe ngumaleko wekeratin, ziye zavela kwiinyamakazi kwizigidi zeminyaka. Izilwanyana zokuqala ezifana nexhama zavela kwixesha lokuqala le-Eocene, malunga ne-50 yezigidi zeminyaka eyadlulayo. La maxhama amandulo ayeneempondo ezincinci, ezingenamasebe, ezazisetyenziselwa ukuzikhusela kumarhamncwa. Ngokuhamba kwexesha, i-antlers yanda kwaye inzima ngakumbi, kwaye yaba yinto ephambili ekukhetheni ngokwesondo. Namhlanje, inkunzi yexhama isebenzisa iimpondo zayo ukukhuphisana nezinye iinkunzi ukuze zifikelele kwiimazi ngexesha lokukhwelana.