2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ntaus raws li peb paub niaj hnub no - lub cev lub cev, qhov siab loj, cov nplooj ntoo lossis fronds - tsis tshwm sim hauv ntiaj teb kom txog rau thaum lub sijhawm Devonian lig, qee qhov 360 lab xyoo dhau los. Tej zaum 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.
Leej twg tuaj thawj shark lossis ntoo?
1. Sharks yog laus dua trees. Sharks tau muaj nyob rau ntau tshaj 450 lab xyoo, thaum tsob ntoo ntxov tshaj plaws, nyob ib ncig ntawm 350 lab xyoo dhau los. Tsis tsuas yog sharks laus dua ntoo, tab sis lawv kuj yog ib qho ntawm cov tsiaj xwb uas tau muaj sia nyob plaub ntawm tsib qhov kev ploj tuag - tam sim no yog qhov txaus nyiam.
xyoo twg ntoo vs sharks?
Zoo qhov tseeb: Sharks tau nyob ib puag ncig ntev dua ntoo
Around 360 lab xyoo dhau los, tam sim no-tuag tsob ntoo Archaeopteris tau tsim ua ntej rau tsob ntoo niaj hnub no, raws li kev tshawb fawb xyoo 1999 los ntawm Virginia Tech.
Tsiaj twg laus dua tus shark?
Elephant Shark Txawm tias nws lub npe, ntxhw shark tsis yog shark, tab sis yog hom ntses cartilaginous. Nws belongs rau ib pawg ntses hu ua ratfish, uas diverged los ntawm sharks txog 400 lab xyoo dhau los. Lawv ntseeg tias yog ib hom kab mob vertebrate qub tshaj plaws.
Yuav ua li cas tsiaj nyob ib ncig ntawm ua ntej ntoo?
Peb hom ntau dua li qub dua ntoo thiab: nautiluses, horseshoe crabs,thiab jellyfish. Tag nrho cov tsiaj dej no tau hu ua "cov pob txha muaj sia."
Pom zoo:
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Daim ntawv pov thawj qub txeeg qub teg hauv Pakistan yog dab tsi?
daim ntawv pov thawj qub txeeg qub teg txhais tau tias? Daim ntawv pov thawj no hu ua "Warasat Nama" lossis "وراثت نامہ" hauv Urdu. Nws yog ib daim ntawv raug cai uas lub tsev hais plaub tau teeb meem. Nws tsim kom muaj kev sib raug zoo ntawm cov qub txeeg qub teg thiab cov neeg tuag.
Dab tsi yog qhov hloov pauv qub txeeg qub teg?
Qhov kev hloov pauv qub txeeg qub teg txhais tau tias yog qhov sib txawv ntawm cov txiaj ntsig ntawm kev yug me nyuam ntawm cov tib neeg, σ A 2, uas yog lub npe hu ua cov tshuaj ntxiv genetic variance. (Nco ntsoov tias qhov tshuaj ntxiv genetic variance tsis suav nrog cov teebmeem kev hloov pauv mus rau cov xeeb ntxwv, xws li cov teebmeem ntxiv-los ntawm-ntxiv epistatic).
Lub hnub qub dab tsi yog dab tsi?
Dabih yog a Ntau Lub Hnub Qub Ntau Lub Hnub Qub Cov Txheej Txheem Cov tshuab no me dua li qhib lub hnub qub pawg, uas muaj ntau qhov sib txawv thiab feem ntau muaj li ntawm 100 txog 1,000 hnub qub. Feem ntau ntau lub hnub qub paub yog triple;
Puas yog cov ntawv qub qub muaj nqis dab tsi?
Tau kawg muaj ntau qhov kev zam rau saum toj no, tab sis feem ntau, txoj hauv kev yuav nrhiav tau $ 50 lossis $ 100 cov ntaub ntawv hauv Yawg sau ntawm xyoo 1940s loj bands thiab cov suab nrov nrov tsis muaj qhov tsis zoo. Qhov tus nqi nruab nrab ntawm feem ntau 78 rpm cov ntaub ntawv muab rau peb yog $ 1 lossis tsawg dua.
