Mary Allen
Zokwawa ndi gulu la nyama zomwe nthawi zambiri zimakhala pamtunda. Zina mwa izo ndi abuluzi, ng’ona, njoka, ndi akamba. M’nyanjamo mumakhala akamba a m’nyanja ndi njoka za m’nyanja.
M'mbiri yakale, zokwawa zinkaonedwa kuti ndi imodzi mwa magulu asanu akuluakulu a zinyama chifukwa ali ndi msana kumbuyo kwawo. Komabe, malingaliro awa ndi akale pang'ono. Masiku ano, asayansi amangotchula nyama zomwe zili ndi zofanana zotsatirazi:
Zokwawa zimakhala ndi khungu louma popanda ntchofu. Izi zimawasiyanitsa ndi amphibians. Komanso alibe nthenga kapena tsitsi, zomwe zimawasiyanitsa ndi mbalame ndi nyama zoyamwitsa. Amapumanso ndi mapapu amodzi, kotero kuti si nsomba.
Zokwawa zambiri zimakhala ndi mchira ndi miyendo inayi. Mosiyana ndi nyama zoyamwitsa, miyendo siili pansi pa thupi, koma kunja kwa mbali zonse ziwiri. Mtundu woterewu umatchedwa kufalikira kwa gait.
Khungu lawo limatetezedwa ndi mamba olimba anyanga, omwe nthawi zina amapanga chipolopolo chenicheni. Komabe, chifukwa mambawa samakula nawo, zokwawa zambiri zimachotsa khungu lawo nthawi ndi nthawi. Izi zikutanthauza kuti amakhetsa khungu lawo lakale. Izi makamaka zimadziwika bwino ndi njoka. Koma akamba amasunga chipolopolo chawo. Iye amakula ndi inu.
Kodi zokwawa zimakhala bwanji?
Zokwawa zazing'ono zimadya tizilombo, nkhono, ndi nyongolotsi. Zokwawa zazikulu zimadyanso nyama zazing'ono zoyamwitsa, nsomba, mbalame, kapena zamoyo zam'madzi. Zokwawa zambiri zimadyanso zomera. Osadya zamasamba ndi osowa kwambiri. Mmodzi wa iwo ndi iguana.
Zokwawa sizikhala ndi kutentha kwenikweni kwa thupi. Amazolowera chilengedwe. Kumatchedwa “kutentha”. Mwachitsanzo, njoka imakhala ndi kutentha kwambiri kwa thupi ikawotchedwa kwambiri ndi dzuwa kusiyana ndi usiku wozizira kwambiri. Ndiye amatha kusuntha moyipitsitsa.
Zokwawa zambiri zimaberekana poikira mazira. Ndi mitundu yochepa chabe yomwe imabereka kuti ikhale yachichepere. Mazira okha a ng’ona ndi akamba ambiri amakhala ndi chigoba cholimba cha mandimu ngati mazira a mbalame. Zokwawa zina zonse zimaikira mazira a zipolopolo zofewa. Izi nthawi zambiri zimakumbukira khungu lolimba kapena zikopa.
Kodi zokwawa zili ndi ziwalo zotani?
Kugaya chakudya kwa zokwawa kumakhala kofanana ndi kwa nyama zoyamwitsa. Palinso ziwalo zofanana za izi. Palinso impso ziwiri zomwe zimalekanitsa mkodzo ndi magazi. Njira yotulutsira ndowe ndi mkodzo imatchedwa "cloaca". Yaikazi nayonso imaikira mazira ake kudzera munjira imeneyi.
Zokwawa zimapuma ndi mapapu pa moyo wawo wonse. Uku ndi kusiyana kwina kwa amphibians. Zokwawa zambiri zimakhalanso pamtunda. Zina, monga ng’ona, zimafunika kubwera pafupipafupi kuti ziziwomba mpweya. Akamba ndi enanso: Ali ndi chikhodzodzo mu cloaca yawo, yomwe amathanso kugwiritsa ntchito kupuma.
Zokwawa zimakhala ndi mtima komanso magazi. Mtima ndi wosavuta pang'ono kuposa wa nyama zoyamwitsa ndi mbalame, koma wovuta kwambiri kuposa wa amphibians. Mwazi watsopano wokhala ndi okosijeni pang'ono umasakanikirana ndi magazi ogwiritsidwa ntchito.