Tus dais ncov qaumteb qabteb tau hloov zuj zus los ntawm cov kabmob daj daj los ntawm hloov nws cov xim plaub mus rau xim dawb, xim zoo tagnrho los sib xyaw nrog nws cov dej khov-them ib puag ncig. … “Peb piv cov noob ntawm cov xim av thiab cov bears dawb thiab xav tsis thoob. Ua ntej thiab qhov tseem ceeb tshaj plaws, polar dais raws li ib hom muaj tsawg dua 480,000 xyoo.
Yuav ua li cas tus dais polar tau dawb?
Tsis zoo li tib neeg cov plaub hau, lub tsho polar bears yog qhov khoob zoo li cov quav cab. Cov raj no me me dhau los pom yam tsis muaj lub tshuab tsom iav, tab sis muaj chaw txaus rau lub teeb kom tawg mus rau hauv. Thaum cov dais sawv hauv lub hnub thiab tag nrho cov teeb ntawd tawm ntawm lawv, lawv saib dawb.
Dab tsi yog qhov tseeb ntawm tus dais polar?
Polar bears muaj dawb pluav kom lawv tuaj yeem nkaum hauv lawv ib puag ncig. Lawv lub tsho tiv no yog qhov zoo camouflaged nyob rau hauv Arctic ib puag ncig uas nws muaj peev xwm qee zaum dhau los ua daus daus. Interestingly, polar dais lub tsho tiv no tsis muaj xim dawb; Qhov tseeb, ib tug polar dais daim tawv nqaij yog dub thiab nws cov plaub hau yog hollow.
Yuav ua li cas cov bears muaj xim av?
Following is a transcript of the video. Polar bears tsis yog dawb. Hloov tawm, lawv tuaj yeem ua txhua yam xim: daj, grey, txiv kab ntxwv, thiab ntsuab. Qhov ntawd yog vim cov paj dais polar bears yog pob tshab thiab hollow.
Brown bears hloov mus ua polar bears li cas?
Cov kev tshawb fawb Evolutionary qhia tias polar bears hloov zuj zus los ntawm brown bears thaum lub sijhawm dej khov. …Lub sij hawm ntawm thaum polar bears thawj zaug tshwm sim raws li hom yog ib qho tseem ceeb vim hais tias nws yuav txiav txim siab thaum twg lawv tau ntsib sov sov nrog me ntsis dej hiav txwv yav dhau los, thiab pab ntsuam xyuas lawv cov lus teb rau tam sim no cov kev hloov nyob rau hauv hiav txwv ice.
