Cov txheej txheem:
- Thaum twg speciation yuav tshwm sim?
- Dab tsi tuaj yeem ua rau qhov tshwj xeeb tshwm sim?
- Puas speciation yuav tshwm sim?
- Qhov twg ntawm cov xwm txheej hauv qab no feem ntau yuav ua rau muaj qhov tshwj xeeb?
Video: Qhov xwm txheej twg yog qhov tshwj xeeb tshaj plaws yuav tshwm sim?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Punctuated equilibrium Punctuated equilibrium Nyob rau hauv evolutionary biology, punctuated equilibrium (tseem hu ua punctuated equilibria) yog ib txoj kev xav uas hais tias ib zaug ib hom tshwm sim hauv cov ntaub ntawv fossil, cov pejxeem yuav ruaj khov, qhia me ntsis evolutionary hloov rau feem ntau ntawm nws cov keeb kwm geological. https://en.wikipedia.org › wiki › Punctuated_equilibrium
Punctuated equilibrium - Wikipedia
feem ntau yuav tshwm sim hauv cov pej xeem me uas muaj kev hloov pauv sai hauv nws ib puag ncig. Punctuated equilibrium feem ntau yuav tshwm sim nyob rau hauv cov pej xeem coob uas nyob hauv thaj chaw ruaj khov maj mam speciation feem ntau yuav tshwm sim hauv cov tsiaj uas nyob hauv huab cua ruaj khov.
Thaum twg speciation yuav tshwm sim?
Ernst Mayr tau hais tawm tsam nws qhov kev xav tias qhov tshwj xeeb tshaj plaws yog thaum cov pej xeem tau los ua thaj chaw sib cais los ntawm ib leeg, xws li kev hloov pauv hauv cov neeg nyob ib leeg yuav ua rau muaj qhov sib txawv txaus ntawm lawv qhov kev tshwj xeeb. yuav yog qhov tshwm sim tshwm sim.
Dab tsi tuaj yeem ua rau qhov tshwj xeeb tshwm sim?
Cov kws tshawb fawb xav tias thaj chaw nyob ib leeg yog ib txoj hauv kev rau cov txheej txheem ntawm speciation pib: dej hloov cov chav kawm, roob nce siab, cov teb chaws drift, kab mob tsiv teb tsaws, thiab dab tsi yog ib zaug. Cov pejxeem tsis tu ncua muab faib ua ob lossis ntau dua cov neeg tsawg.
Puas speciation yuav tshwm sim?
Rau tus nqi siab ntawm kev kawm, speciation yog feem ntau yuav tshwm sim los ntawm kev hloov pauv ntawm qhov kev nyiam nyob hauv caj ces. Txawm li cas los xij, qhov kawg tsuas yog tshwm sim thaum cov txiaj ntsig ntawm kev hloov pauv loj, lossis thaum muaj kev sib txuas ntawm cov noob coding rau qhov sib txawv.
Qhov twg ntawm cov xwm txheej hauv qab no feem ntau yuav ua rau muaj qhov tshwj xeeb?
Speciation yog txheej txheem los ntawm cov hom tshiab tsim. Dab tsi ntawm cov xwm txheej hauv qab no feem ntau yuav ua rau muaj kev tshwj xeeb? Ib tug pej xeem sib cais los ntawm ib puag ncig los ua ob pawg uas tsis sib txuas nrog ib leeg Av qeeg tsim lub chasm uas cais cov pej xeem ntawm squirrels.
Pom zoo:
Qhov xwm txheej dej nyab tshwm sim ntau tshaj?
Kev nyab xeeb ntawm cov dej ntws thiab cov kwj deg - qhov nce ntawm cov dej hauv cov dej ntws thiab cov dej ntws los ntawm cov channel mus rau qhov dej nyab uas nyob ib sab - sawv cev rau cov xwm txheej dej nyab classic uas neeg feem coob koom nrog lo lus "
Puas yog tshwj xeeb lossis tshwj xeeb?
Cov lus no muaj lub ntsiab lus zoo ib yam. Qhov txawv tsuas yog nyob rau hauv lawv cov ntawv sau. Kev tshwj xeeb yog nyob deb ntawm qhov kev xaiv nrov dua hauv Asmeskas Lus Askiv, yog li koj yuav tsum siv nws tshwj xeeb nrog cov neeg Asmeskas.
Cov tshuaj tiv thaiv twg yog qhov tshwj xeeb tshaj plaws rau sle?
Kev kuaj tshuaj tiv thaiv kab mob tiv thaiv kab mob (ANA) yog qhov kev tshuaj ntsuam xyuas feem ntau siv rau SLE. Lub xub ntiag ntawm anti-DNA, anti-Sm, thiab antiphospholipid tshuaj tiv thaivyog qhov tshwj xeeb tshaj rau kev kuaj mob SLE .
Qhov twg yog qhov kev tua neeg tuag coob tshaj plaws tshwm sim?
Cov yeeb yam ua raws li cov neeg nuv ntses hauv nkoj nuv ntses hauv hiav txwv Bering thaum lub caij Alaskan huab tais roob ris thiab daus roob ris caij nkoj. Lub hauv paus ntawm kev ua haujlwm rau lub nkoj nuv ntses yog lub Aleutian Islands chaw nres nkoj ntawm Dutch Harbor, Alaska .
Leej twg yog qhov tshwj xeeb tshaj plaws rau kev ua qhev?
Tsis xav tsis thoob, poj niam thiab cov ntxhais muaj kev pheej hmoo ntau dua txiv neej thiab tub. Cov poj niam ua rau feem ntau ntawm cov neeg raug kev tsim txom - 55% yog cov poj niam thiab cov ntxhais, thiab suav rau feem coob ntawm cov neeg siv deev.
