Video: Hom kev hloov pauv txawv txawv li cas pom ntawm cov Islands tuaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Divergent evolution tshwm sim thaum ob hom sib cais evolve txawv ntawm ib tug poj koob yawm txwv. Speciation yog los ntawm sib txawv evolution thiab tshwm sim thaum ib hom diverges mus rau ntau hom xeeb leej xeeb ntxwv. Darwin's finches yog ib qho piv txwv ntawm qhov no.
Yog li, hom kev hloov pauv hloov pauv dab tsi feem ntau pom ntawm cov Islands tuaj?
Tshooj 7 (Evolution) Cov Lus Txhais - Lub caij nplooj zeeg 2018
| A | B |
|---|---|
| Tsim ib hom tshiab los ntawm cov txheej txheem ntawm divergent evolution | Qhov tshwj xeeb |
| Kev sib txawv sai sai thiab speciation los ntawm ib tug poj koob yawm txwv feem ntau pom ntawm cov Islands tuaj | Kev hloov hluav taws xob |
| Kev tsim ntawm ib hom tshiab los ntawm kev cais thaj chaw | Allopatric speciation |
Ob hom twg zoo sib xws tab sis muaj kev hloov pauv hloov pauv? Ob hom uas yog heev zoo sib xws thiab tau undergone divergent evolution yog cov khoom siv hma (Vulpes macrotis) thiab Arctic hma liab (Vulpes lagopus).
Ua raws li qhov no hauv kev xav, dab tsi yog qhov piv txwv ntawm kev hloov pauv txawv txawv?
Divergent evolution tshwm sim thaum cov tsiaj muaj feem xyuam nrog tsim cov yam ntxwv tshwj xeeb vim muaj qhov sib txawv ntawm ib puag ncig lossis kev xaiv xaiv. Ib qho classic piv txwv ntawm divergent evolution yog Galapagos finch uas Darwin pom tias nyob rau hauv ib puag ncig sib txawv, cov finches 'beaks yoog txawv.
Dab tsi yog lwm lub npe rau kev hloov pauv hloov pauv?
Divergent evolution los yog sib txawv kev xaiv yog sib sau ua ke ntawm qhov sib txawv ntawm cov neeg muaj feem xyuam nrog nyob rau hauv ib hom, ua rau speciation.
Pom zoo:
Vim li cas cov hnub qub dhau los ntawm kev hloov pauv hloov pauv?
Stellar evolution yog tus txheej txheem uas lub hnub qub hloov pauv nyob rau lub sijhawm. Cov hnub qub uas muaj tsawg kawg yog ib nrab ntawm lub hnub tuaj yeem pib tsim lub zog los ntawm kev sib xyaw ntawm helium ntawm lawv cov tub ntxhais, thaum lub hnub qub ntau dua tuaj yeem sib xyaw cov ntsiab lus hnyav dua raws li cov khoom sib xyaw ua ke
Vim li cas tom qab kev hloov pauv kev hloov pauv tseem ceeb?
Kev hloov pauv tom qab kev txhais lus (PTMs) xws li glycosylation thiab phosphorylation ua lub luag haujlwm tseem ceeb ntawm kev ua haujlwm ntawm hemostatic proteins thiab tseem ceeb heev hauv kev teeb tsa kab mob. Xws li theem nrab hloov pauv rau cov proteins hemostatic muaj ntau yam cuam tshuam rau lawv lub peev xwm los cuam tshuam nrog lwm cov proteins
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Cov kev hloov ntawm lub cev txawv ntawm cov tshuaj hloov pauv li cas muab ib qho piv txwv ntawm txhua tus?
Kev hloov tshuaj lom neeg tshwm sim los ntawm cov tshuaj tiv thaiv tshuaj, thaum lub cev hloov pauv yog thaum cov teeb meem hloov pauv tab sis tsis yog tshuaj lom neeg. Piv txwv ntawm kev hloov tshuaj lom neeg yog hlawv, ua noj, xeb, thiab rotting. Piv txwv ntawm kev hloov lub cev yog boiling, melting, khov, thiab shredding
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system