Puas yog sharks no ua ntej dinosaurs?

Cov txheej txheem:

Puas yog sharks no ua ntej dinosaurs?
Puas yog sharks no ua ntej dinosaurs?

Video: Puas yog sharks no ua ntej dinosaurs?

Video: Puas yog sharks no ua ntej dinosaurs?
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Sharks yog cov Ntiaj Teb cov tsiaj qub tshaj plaws. Thawj evolving tshaj 455 lab xyoo dhau los, sharks yog nyob deb tshaj li thawj dinosaurs, kab, tsiaj txhu los yog txawm ntoo.

Puas yog sharks laus dua dinosaurs?

Qhov tseeb, sharks thiab lawv cov txheeb ze yog thawj vertebrate predators hauv ntiaj teb. Shark fossils hnub rov qab ntau dua 400 lab xyoo - uas txhais tau hais tias sharks tau tswj kom ciaj sia cov dinosaurs, ciaj sia nyob rau hauv loj extinctions, thiab txuas ntxiv ua lub luag haujlwm tseem ceeb nyob ze rau saum cov khoom noj hauv qab dej.

sharks tuaj qhov twg?

Cov laus tshaj plaws paub tseeb shark nplai tau pom nyob rau hauv Siberia los ntawm ib tug shark uas nyob 420 lab xyoo dhau los thaum lub Silurian Sijhawm, thiab cov hniav laus tshaj plaws pom yog los ntawm Devonian Lub Sijhawm, qee qhov 400 lab xyoo dhau los. Raws li cov pob txha pob txha no, ntau dua 2,000 hom fossil sharks tau piav qhia.

Puas muaj sharks ua ntej ntoo?

Koj yuav xav tsis thoob thaum kawm tias sharks laus dua ntoo raws li lawv tau nyob ib puag ncig tsawg kawg 400 lab xyoo Sharks tau nyob ib puag ncig ntev heev, ua pov thawj lawv resilience. … Qhov ntxov tshaj plaws shark hniav yog los ntawm thaum ntxov Devonian deposits, ib co 400 lab xyoo, nyob rau hauv niaj hnub no yog Europe.

Yuav ua li cas ua ntej dinosaurs?

Thaum lub sijhawm tag nrho lub ntiaj teb av tsim ib lub teb chaws, Pangea. Lub hnub nyoog tam sim ntawd ua ntej lub dinosaurs hu ua PermianTxawm hais tias muaj cov tsiaj reptiles, cov qauv ntawm cov dinosaurs thaum ntxov, daim ntawv tseem ceeb ntawm lub neej yog trilobite, pom qhov chaw nruab nrab ntawm cov ntoo louse thiab armadillo..

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