Ngoobani ezincancisayo yaye zahluke kwezinye izilwanyana?

Ngoobani izilwanyana? Le iklasi iquka izilwanyana eziphuhlileyo ngokupheleleyo amarhamncwa ezahlukeneyo: nendlovu enkulu kunye mouse-vole amancinane, yingcuka eqwengayo nemvana abalulamileyo. Bahlala bonke isihobe: emhlabeni, elwandle (dolphins and whales), umoya (ilulwane). Kodwa yintoni eyenza ukuba ezinye izilwanyana? igazi Ukuncoma? Lo msebenzi osemqoka efanayo ikhona neentaka zezulu. Ukukwazi azale eziphilayo? Kaloku, okokuqala, asizizo zonke izilwanyana ezanyisayo zinazo viviparous. Abanye babo babeke amaqanda abo, njengoko, umzekelo, i-platypus, lo gama abanye abaselula ekuzalweni kufana ngeembumba zobuntwana aze kufuneka 'ukuvuthwa "ngendlela ekhethekileyo isifukamisi-kwisingxobo ngesisu sikanina ngathi yikhangaru. Okwesibini, kukho izirhubuluzi viviparous abanye, intlanzi kunye nezinambuzane. Ngomhla umbuzo ngubani ezanyisayo ngaphezu zahlukile iintlanzi, impendulo ilula: phambi ukukhanya. Zonke izilwanyana siphefumle umoya. Ngoko ke, lo ukrebe akuyomfuneko ukuba banyukele wobuso ukuphefumla, ngokungafaniyo ngathi eku xhulumaneni yakhe inkangeleko, nto leyo barhaxwe nje ingekho i-oksijini odlisa ubomi. Kodwa ke, kwakhona, imiphunga kufuneka eziphila ezininzi nobu-, nazo zonke iintaka.

Phakathi enkulu umahluko izilwanyana ziyakwazi ukuchongeka ezimbini kuphela parameters ezibalulekileyo ezanyisayo. Yeyona ubukho iinwele kunye amathole ukutya amasi. Yonke iimazi le amaqela izilwanyana eziphezu umzimba kwamadlala mammary, leyo bazaliswe ulwelo kwezondlo kokuba luzelwe. Lo mhlaba wayinika igama zonke ezincancisayo. Phakathi kwezinye izinto, ziimpawu izilwanyana, ungongeza ubukho kwemihlathi esezantsi, equka ngethambo enye, kwaye uvalo into eyohlula imiphunga kunye intliziyo ukusuka lokugaya.

Kodwa Eyona nto ibalulekileyo ekuqinisekiseni ukuba ngubani ezanyisayo na ingqondo yabo kuphuhliswa kakhulu nokuziphatha inkqubo bhetyebhetye. Oku kuthetha ukuba abantu ababini zohlobo olufanayo, kanye kuloo meko efanayo ebomini, ukuze siziphathe ngenye indlela eyahlukileyo. Bona bayakwazi ukusebenzisa amava abo, ukuba uyigcine, baqiqe. Akumangalisi ukuba udidi lwe ezanyisayo wabonakala ngenxa Homo sapiens - Homo sapiens. Kaloku, ngaphandle kuye on Earth omiweyo malunga 5000 entlobo nezinye izilwanyana, neyohlulwe kwi KABLOOM 1100 kwisizukulwana, iintsapho 140 nemiyalelo-18 kunye neentsapho 3.

Akukho umdla bade zemizimba ezanyisayo. Kuba bonke abonakale iyantlukwano yabo (ezizingelayo izikhonkwane, iminwe kunye iinkawu yabantu, uphuphu), bonke bagcina nge umhlehlo horny - kozipho. Izilwanyana ezihlala emanzini, ezi nkqubo kuya yome. Olu phawu ukuziqhelanisa neemeko zokusingqongileyo negalelo yokuba ezanyisayo ziye esizigubungeleyo zonke phezu komhlaba wamzeka yonke niche ebomini - phezu komhlaba, emoyeni, elwandle, phantsi komhlaba. Ngenxa ukukwazi ukugcina iqondo lobushushu emzimbeni ezinegazi elishushu, aphile kwi Arctic (amabhere) kunye ashinyeneyo (nempuku, iinkamela) kwiintalango.

Umbuzo ngulo: xa kwakukho izilwanyana bokuqala? Akukho mathandabuzo ukuba ezanyisayo midala ubudala Dinosaurs. Ngoko ke baba kakhulu yayimfutshane ngesithomo, waza wabonisa iimpawu "izirhubuluzi zezilwanyana-like." Njengoko izazinzulu esebenza amathambo, onawo zabo kuphela amathambo, kunzima ukumisela kuxeshani kwezi zilwanyana wabonakala uboya kunye nesakhono yokondla amathole ubisi. Ukuba luzakuqala ukusuka mandible bemfuno edinokostnoy, sinako ngokukhuselekileyo Ndithi kwanaloo 215 yezigidi kwiminyaka eyadlulayo eMzantsi Afrika, iYurophu kunye China kumiwa ngabantu encinane (15 cm), isilwanyana efana shrew mihla.