Kwemvelo: wayeka noma cha?

Ososayensi abaningi bakhathazekile mbuzo: "Ingabe kwemvelo wayeka"? Iningi lazo ukholelwa ukuthi impendulo kufanele ibe nguyebo. Ngempela, uma sicabanga ngale nqubo njengoba ukuzihlela nokuzivumelanisa kwemvelo, ke mhlawumbe abantu abakwazi nokuguquguquka yanqoba ngokuphelele imvelo kanye nekhono ukuzondla futhi izingane zabo? Futhi kwentuthuko yezokwelapha zesimanje, noma yikuphi ukungabaza zinyamalale - sawo sifinyelela ekupheleleni walo.

Kodwa sikhundla has amaphuzu ayo ababuthakathaka. Stealth akusho ukungabi. kwemvelo Modern - inqubo ngempela kancane, ngakho-ke kunzima kakhulu ukulandelela ngesikhathi sangempela. Ngaphezu kwalokho, kucatshangwa ingcebo kuholela esiphethweni okuphikisana nemiphumela yokucwaninga ngezakhi zofuzo zomuntu.

Okwakushiwo elula kwegama elithi "ukuziphendukela kwemvelo" ithi inqubo ekushintsheni ukuvama alleles ezweni elinabantu ngokuhamba kwesikhathi. Iningi zinguquko esikhundleni esisodwa allele nezinye ngaphansi kwethonya ukuzihlela nokuzivumelanisa kwemvelo. Ukuze athole indlela kwemvelo ihamba, lwanele ukuthola noma iziphi izimpawu allele imvamisa ushintsho ufuzo.

Ucwaningo lwamuva luye avunyelwe ukuchaza ezinye izibonelo yesiteleka kakhulu kwemvelo wabantu yesimanje.

Okokuqala - lena okuthiwa engamamitha ukugula. Izizwe azinza ezindaweni sezintaba emhlabeni, sibhekene umoya-mpilo owanele emoyeni. nokuswela okunjalo kuholela ekuphikeni ukutubeka komzimba, isiyezi kanye nokuqwasha. Ezimweni ezimbi kakhulu, imiphumela engelapheki - edema yamaphaphu futhi okwalandela ukufa esindayo. Futhi acclimatization Ungasusa kuphela ingxenye izimpawu.

Phakathi nocwaningo kwatholakala ukuthi abantu bomdabu of Tibet baye bazivumelanisa nezimo ezikhona ngesimo yokushodelwa umoya. Kuye kwatholakala ukuthi iningi Tibetan igazi elingenawo umoya saturation 10%, uma kuqhathaniswa nabantu abavamile. Lesi sici njengefa, ngakho ungakwazi ngokuphepha ukuphakamisa ukuthi incike isakhi esisodwa.

Esinye isibonelo okuphawuleka zokungezwani ne-lactose. Kuyinto carbohydrate ukuthi kutholakala kuphela ubisi ezincelisayo. It is ugxile emzimbeni womuntu ngosizo enzyme akhethekile - lactase, okuyinto kuveza okukhulu onyakeni wokuqala wokuphila, okwathi ngemva kwalokho zamagama we ketshezi isiyaphela. Iningi lactase abadala hhayi kwemiqondo, Ngakho-ke, i-lactose akuyona matasa cishe.

Ngokumangalisayo, wamaNdiya aseMelika, Avstraliyskie Aborigeny, abakhileyo South-East Asia laseMzansi abahlushwa ukuphuza ubisi lonke. Kubangela ukuvuvukala, uhudo, colic, ukuhlanza kanye nesicanucanu. Ngesikhathi esifanayo bakwazi ukudla imikhiqizo yobisi, njengoba inqubo ukuvutshelwa ahlahlele-lactose.

Ikhono ukugaya i-lactose lapho usukhulile abantu ukuthengwa kwezincwadi ku amazwekazi amabili ahlukene - Yurophu naseNyakatho Afrika. Ngesikhathi esifanayo basebesukuma ngayodwana futhi avele ezingxenyeni ezahlukene ufuzo. Lokhu kuguquka double isibe liyisibonelo eliqinisekile ukuvela umuntu eqhubeka.

ngokukhethekile kufanele kukhokhelwe ngengculaza. A wesandulela sifo, eqale e-80s, isibe ngenye yezinto ezinkulu lokubala ubuningi babantu ngaleso sikhathi. Cishe abayizigidi ezingu-40. Abantu yilesi sifo, futhi eliphakeme ubhubhane e-Afrika eseningizimu, lapho abangu-25% wabantu abadala elinegciwane.

Kuye lidlule izigaba eziningi yokuziphendukela kwemvelo - kodwa omunye Ukhiye ukuzihlela nokuzivumelanisa kwemvelo. Abakhumbulayo ukuthi wayengomunye wabantu zezici ka ukuvela AIDS, ngoba kusho othile kuguquka izinqubo, ekuvikeleni ngokumelene sifo. Futhi, cishe, ngokuhamba kwesikhathi, umzimba womuntu kwakhiwa compounds ezithile ezingaba ukubhekana ngokuphumelelayo nalesi isifo esingalapheki.

Umsuka kanye kwemvelo indoda yathatha engaphezu kwenkulungwane edlule. Phakathi nalesi sikhathi, siye sanda ivolumu zobuchopho, washintsha izici, saqala ukuhamba uqonde, bafunda ukuxoxa. Nsuku zonke senza ukuthuthukisa, bathole amakhono amasha namakhono ukulwa ngempumelelo lesi sifo bese uzama ukuqhubeka ziphila kuleli zwe eziyinkimbinkimbi, ngakho asikwazi ukuthi kwemvelo ime, kumane kancane kancane indawo yawo.