Cov kab mob uas muaj cov yam ntxwv zoo sib xws tuaj yeem nqis los ntawm cov poj koob yawm txwv. Qhov ntau zoo sib xws ob pawg yog, qhov tsis ntev los no lawv cov poj koob yawm txwv tej zaum yog. Daim duab tsob ntoo ceg qhia tau hais tias kev sib raug zoo evolutionary ntawm cov kab mob.
daim duab tsob ntoo qhia tau li cas?
Ib daim duab qhia txog tus yam ntxwv uas koom nrog cov kab mob thiab cov yam ntxwv twg ua rau cov kab mob sib cais (lossis ceg) ntawm ib leeg ntawm kev hloov pauv tsob ntoo rau ua hom tshiab. Cov kab taw qhia rau sab xis qhia txog kev hloov pauv ntawm qee yam yam ntxwv los ntawm lub sijhawm.
daim duab tsob ntoo hu ua dab tsi?
Ib tsob ntoo phylogenetic yog daim duab uas qhia txog kev sib raug zoo evolutionary. Cov ntoo no, feem ntau piv rau tsev neeg ntoo, yog tsim los siv ntau yam pov thawj feem ntau siv DNA. Hauv cov ntoo phylogenetic, qee zaum qhov ntev ntawm cov ceg sawv cev rau lub sijhawm txij li ib pab pawg sib cais los ntawm ib leeg.
Lub hom phiaj ntawm daim duab kab ntawv sau li cas?
Ib daim duab ceg zoo li ib yam li daim duab qhia cov qauv ntawm lub koom haum. Lossis koj yuav xav txog txoj kev no ua ib txoj hauv kev tsim "tsev neeg tsob ntoo" rau lub tswv yim loj uas koj tau xaiv los sau txog.
txhais ntawm tsob ntoo yog dab tsi?
Definition. Ib tus cim qhia txog ceg uas tus qauv ntawm tsob ntoo txiav txim siab tau nthuav tawm graphically raws li cov qauv ceg, suav nrog cov kab ntawm cov khoom Ntxiv. Nyob ntawm tus naj npawb ntawm cov ceg ntawm ib qho taw tes, ib qho tseem ceeb ntawm ceg yuav yog dichotomous lossis polytomous.
