Feathers yog cov txheej txheem nyuaj thiab tshiab evolutionary. Lawv tsis tau hloov pauv ncaj qha los ntawm cov tsiaj reptilian, raws li ib zaug tau xav. Feathers nrog cov yam ntxwv niaj hnub muaj nyob hauv ntau hom ntawm ntau hom theropod dinosaurs. …
Puas nplai thiab plaub muaj feem?
Cov noob uas ua rau cov nplais ua plaub hauv cov poj koob yawm txwv ntawm cov noog tau pom los ntawm Asmeskas cov kws tshawb fawb. Los ntawm kev nthuav tawm cov noob no hauv embryo alligator daim tawv nqaij, cov kws tshawb fawb tau ua rau cov tsiaj reptiles 'scale hloov pauv nyob rau hauv ib txoj kev uas tej zaum yuav zoo ib yam li qhov ntxov tshaj plaws plaub evolved.
Thaum twg plaub tau hloov zuj zus?
Raws li cov pov thawj pob txha, peb paub tias thawj cov tsis yog avian theropods nrog cov plaub hau yooj yim, ib leeg-ntiv nplhaib nyob txog 190 lab xyoo dhau los, thiab cov uas tsis yog avian theropods nrog. Feathers muaj ib tug complex branching qauv zoo li cov noog niaj hnub no (pennaceous feathers) muaj txog 135 lab xyoo dhau los.
Puas yog plaub hau plaub hau hloov ua ntej?
Cov plaub hau, nplai, thiab plaub zoo li muaj tsawg heev. Tab sis cov qauv no tshwm sim tau hloov zuj zus los ntawm ib tus poj koob yawm txwv-ib tug tsiaj reptile uas nyob 300 lab xyoo dhau los-raws li kev tshawb fawb tshiab.
Feathered dinosaurs hloov zuj zus li cas?
A feathered dinosaur yog txhua hom dinosaur muaj plaub. … Nws tau raug qhia tias plaub muaj keeb kwm hloov zuj zus rau lub hom phiaj ntawm thermalrwb thaiv tsev, raws li tseem yog lawv lub hom phiaj nyob rau hauv lub down feathers ntawm me nyuam mos noog hnub no, ua ntej lawv tshwm sim hloov nyob rau hauv cov noog rau hauv cov qauv uas txhawb kev ya.
