Dab tsi yog lub ntsiab lus ntawm kev taw qhia kev xaiv?
Dab tsi yog lub ntsiab lus ntawm kev taw qhia kev xaiv?

Video: Dab tsi yog lub ntsiab lus ntawm kev taw qhia kev xaiv?

Video: Dab tsi yog lub ntsiab lus ntawm kev taw qhia kev xaiv?
Video: 6 Nqi Lus Qhia Kev Ua neej ( leej twg mloog lub neej yuav zoo tuaj) 2024, Kaum ib hlis
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Hauv cov noob caj noob ces, kev taw qhia kev xaiv yog hom ntawm ntuj tsim xaiv nyob rau hauv uas ib tug huab phenotype yog nyiam tshaj lwm phenotypes, ua rau lub allele zaus hloov lub sij hawm nyob rau hauv cov kev taw qhia ntawm phenotypes.

Tsis tas li ntawd, dab tsi yog ib qho piv txwv ntawm kev xaiv kev taw qhia?

Ib piv txwv ntawm txoj kev xaiv yog cov ntaub ntawv fossil uas qhia tau hais tias qhov loj ntawm cov bears dub hauv Tebchaws Europe tau txo qis thaum lub sijhawm interglacial ntawm lub hnub nyoog dej khov, tab sis tau nce ntxiv thaum lub sijhawm glacial. Lwm tus piv txwv yog lub beak loj nyob rau hauv cov pejxeem ntawm finches.

Dab tsi yog txoj kev xaiv yooj yim? kev taw qhia kev xaiv : ib hom ntawm ntuj xaiv nyob rau hauv uas ib tug phenotype yog nyiam, ua rau lub allele zaus mus tas li hloov nyob rau hauv ib qho kev taw qhia. cuam tshuam xaiv : (los yog diversifying xaiv ) ib hom ntawm ntuj xaiv nyob rau hauv uas qhov tseem ceeb tshaj plaws rau qhov zoo yog nyiam tshaj qhov tseem ceeb nruab nrab.

Hauv qhov no, dab tsi yog qhov zoo tshaj plaws txhais ntawm kev taw qhia kev xaiv?

ib txoj kev uas ob hom tsis tuaj yeem tsim dua tshiab. ib tug txheej txheem uas ib tug ntawm cov huab variations ntawm ib tug zoo nyiam. ib tug txheej txheem los ntawm cov neeg uas muaj ob qho tag nrho ntawm ib tug zoo nyiam.

Dab tsi yog qhov txawv ntawm kev cuam tshuam thiab kev taw qhia kev xaiv?

Kev taw qhia kev xaiv tau piav raws li qhov xaiv rau ib qho tshwj xeeb phenotype hauv pejxeem as opposed to the other phenotypes. Kev xaiv cuam tshuam yog thaum cov pejxeem muaj xaiv pressures ua raws li nws uas xaiv tawm tsam qhov nruab nrab phenotypes thiab huab phenotypes yog xaiv rau.

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