2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Brachiopods muaj keeb kwm ntev heev ntawm lub neej hauv ntiaj teb; tsawg 550 lab xyoo. Lawv thawj zaug tshwm sim li pob zeb hauv pob zeb ntawm lub hnub nyoog Cambrian ntxov tshaj plaws thiab lawv cov xeeb leej xeeb ntxwv muaj sia nyob, txawm tias tsis tshua muaj, nyob rau hnub no cov dej hiav txwv thiab hiav txwv.
Brachiopods nyob ntev npaum li cas?
Brachiopods muaj cov ntaub ntawv fossil uas nws kim heev, thawj zaug tshwm sim hauv pob zeb hnub rov qab mus rau lub sijhawm thaum ntxov ntawm Cambrian Period, txog 541 lab xyoo dhau los. Lawv muaj ntau heev thaum lub sij hawm Paleozoic Era, mus txog lawv cov kev sib txawv ntau tshaj li 400 lab xyoo dhau los, thaum lub sij hawm Devonian.
Vim li cas cov brachiopods thiaj li ploj mus?
Tshauv los ntawm sab hnub poob Tuam Tshoj Emeishan Traps, piv txwv li, hnub tim rau Capitanian thiab yav dhau los tau cuam tshuam los ntawm qhov ua rau muaj peev xwm ua rau lub zos brachiopod extinction. Nws muaj peev xwm "uas nce atmospheric carbon dioxide [los ntawm volcanic eruptions] coj mus rau dej hiav txwv acidification," Bond hais.
Puas yog brachiopods tua poj koob yawm txwv ntawm bivalve molluscs?
Brachiopods yog cov pob txha loj heev thoob plaws Palaeozoic. … Ua ntej qhov kev tshwm sim ploj mus, brachiopods muaj ntau thiab ntau yam tshaj li bivalve mollusks. Tom qab ntawd, hauv Mesozoic, lawv qhov sib txawv thiab cov lej tau txo qis heev thiab lawv tau hloov pauv los ntawm bivalve molluscs.
Ib puag ncig twg brachiopods nyob?
Brachiopods nyob rau dej hiav txwv pem teb. Lawv tau pom nyob hauv ibQhov ntau ntawm cov dej tob los ntawm cov dej ntiav heev ntawm cov pob zeb shorelines mus rau dej hiav txwv pem teb peb thiab ib nrab mais hauv qab dej hiav txwv. Lawv paub los ntawm ntau qhov chaw, xws li cov dej sov sov ntawm Caribbean mus rau lub hiav txwv Antarctic txias.
Pom zoo:
Britney hmuv hnub nyoog pes tsawg?
Britney Jean Spears yog Asmeskas tus neeg hu nkauj, sau nkauj, thiab ua las voos. Nws tau txais txiaj ntsig los ntawm kev cuam tshuam rau kev txhawb siab ntawm cov tub ntxhais hluas pop thaum lub sijhawm xyoo 1990s thiab thaum ntxov 2000s, uas nws raug hu ua "
Andrea motis hnub nyoog pes tsawg?
Andrea Motis yog tus neeg hu nkauj Spanish jazz thiab trumpeter uas hu nkauj hauv Catalan, Spanish, Portuguese thiab Askiv. Tus txiv Andrea Motis yog leej twg? Andrea Motis thiab Scott Hamilton. Dab tsi instruments Andrea Motis?
Hnub nyoog pes tsawg hnub no shenseea?
Chinsea Lee, nrov npe hu ua Shenseea, yog Jamaican seev cev chav kaw neeg ua yeeb yam, tus hu nkauj, thiab sau nkauj. Shenseea thaum nws muaj nws tus tub? Nyob rau xyoo 2015, thaum muaj hnub nyoog 19, Shensea yug nws tus tub, npe hu ua Rajeiro Lee, ua ntej nws txoj haujlwm suab paj nruag tawm.
Hnub nyoog twg pib hnub nyoog li cas?
Lub Hnub Nyoog Kev Sib Haum Xeeb hauv Txoj Cai Kev Ua Haujlwm ntawm 1967 (ADEA) (29 U.S.C. § 621 txog 29 USC § 634) yog tsoomfwv txoj cai lij choj uas muab qee yam kev tiv thaiv kev ua haujlwm rau cov neeg ua haujlwm tshaj hnub nyoog plaub caug, leej twg ua haujlwm rau tus tswv haujlwm uas muaj nees nkaum lossis ntau tus neeg ua haujlwm.
Hnub nyoog twg yog hnub nyoog nruab nrab?
Hnub nyoog nruab nrab, lub sijhawm ntawm tib neeg kev laus uas tam sim ntawd ua ntej qhov pib ntawm kev laus. Txawm hais tias lub sijhawm muaj hnub nyoog uas txhais cov hnub nyoog nruab nrab yog me ntsis arbitrary, txawv heev ntawm ib tug mus rau ib tug neeg, feem ntau txhais tau tias yog nruab nrab ntawm cov hnub nyoog ntawm 40 thiab 60.
