UMary Allen
Isingeniso: Inyamazane Yensikazi Enezimpondo
Izinyamazane zaziwa ngezimpondo zazo ezihlukile, ezivame ukubonakala ngesikhathi sokukhwelana. Nokho, akuzona izinyamazane eziyiduna kuphela ezimila izimpondo. Inyamazane yezinsikazi, eyaziwa nangokuthi yenza, ingakhula nezimpondo, nakuba lokhu kuyivelakancane kakhulu. Isimo sezinyamazane zezinsikazi ezinezimpondo sekuyisikhathi eside sathakazelisa izazi zezinto eziphilayo, futhi kuningi okungafundwa mayelana nenjongo yokuziphendukela kwemvelo yalezi zakhiwo.
I-Evolution of Horns in Deer
Izimpondo, ezakhiwe ngethambo futhi zimbozwe ungqimba lwe-keratin, ziye zavela ezinyamazaneni phakathi nezigidi zeminyaka. Izilwane zokuqala ezifana nezinyamazane zavela esikhathini sokuqala se-Eocene, cishe eminyakeni eyizigidi ezingu-50 edlule. Lezi zinyamazane zakuqala zazinezimpondo ezincane, ezingenagatsha, ezazisetshenziselwa ukuzivikela ezilwaneni ezidla ezinye. Ngokuhamba kwesikhathi, ama-antlers akhula amakhulu futhi ayinkimbinkimbi, futhi abe yisici esibalulekile ekukhetheni ubulili. Namuhla, izinyamazane eziduna zisebenzisa izimpondo zazo ukuze ziqhudelane namanye amaduna ukuze zifinyelele ezinsikazi ngesikhathi sokukhwelana.