Leej twg hais txog kev hloov pauv?

Video: Leej twg hais txog kev hloov pauv?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Raws li cov kev soj ntsuam saum toj no, Hugo de Vries (1901) muab tso rau hauv ib txoj kev xav ntawm evolution, hu ua kev hloov pauv kev xav. Txoj kev xav hais tias evolution yog ib tug jerky txheej txheem uas tshiab ntau yam thiab hom yog tsim los ntawm kev hloov pauv (discontinuous variations) uas ua hauj lwm raws li raw khoom ntawm evolution.

Kuj nug, leej twg nrhiav tau kev hloov pauv?

Hugo De Vries

Ib yam li ntawd, Hugo de Vries nrhiav tau dab tsi? Hugo de Vries (1848-1935), Dutch botanist thiab geneticist, yog tus sau ntawm kev hloov pauv txoj kev xav ntawm evolution. Nws txoj hauj lwm tau coj mus rau qhov rov tshawb nrhiav thiab tsim kho Mendel txoj cai. Hugo de Vries yug Lub Ob Hlis 16, 1848, hauv Haarlem.

Ib tug kuj yuav nug, leej twg tau hais txog kev hloov pauv ntawm cov organic evolution?

Hugo de Vries, ib tug Dutch botanist proposed mutation theory piav qhia lub mechanism ntawm evolution . Nws kev xav tau luam tawm xyoo 1901 hauv nws phau ntawv Tuag Kev hloov pauv Nws ua kev sim rau yav tsaus ntuj primrose, raws li nws, kev hloov pauv yog tam sim ntawd thiab keeb kwm kev hloov pauv uas raug xaiv los ntawm ntuj tsim.

Leej twg yog leej txiv ntawm kev hloov pauv?

Hugo de Vries

Pom zoo:

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

Vim li cas peb thiaj li hais txog kev txwv tsis pub muaj kev hais tawm thiab thaum twg peb yuav hais cov kev txwv?

Peb hais txog kev txwv vim nws yuav ua rau qhov sib npaug tsis tau txhais hauv qee qhov txiaj ntsig ntawm x. Qhov kev txwv ntau tshaj plaws rau cov lus qhia muaj nuj nqis yog N / 0. Qhov no txhais tau tias txhua tus lej muab faib los ntawm xoom tsis tau txhais. Piv txwv li, rau txoj haujlwm f(x) = 6/x², thaum koj hloov x = 0, nws yuav ua rau 6/0 uas tsis tau txhais

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

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