hom kab mob lom neeg yog cais tawm ntawm ib leeg. Lub ntsiab txhais yog qee zaum txuas ntxiv kom xav tau tias qhov kev yug me nyuam yuav tsum tshwm sim nyob rau hauv ntuj, tsis yog khoom tsim (xws li, raug ntes). Evolution of reproductive isolating mechanisms tiv thaiv hom nascent los ntawm interbreeding.
txhais tau li cas thaum ob hom kev sib cais cais tawm?
txhais li cas rau ob hom kev sib cais ntawm ib leeg? Cov tswv cuab ntawm ob hom tsis tuaj yeem sib txuas thiab tsim cov xeeb ntxwv. 4.
Yuav ua li cas 4 txoj hauv kev uas hom tuaj yeem sib cais cais tawm?
Cov txheej txheem no suav nrog kev siv lub cev lossis lub cev muaj kev cuam tshuam rau fertilization
- Kev cais ib ntus lossis thaj chaw nyob. …
- Kev cais tus cwj pwm. …
- Mechanical cais. …
- Kev sib cais kev ua si. …
- Zygote tuag thiab tsis muaj kev vam meej ntawm hybrids. …
- Hybrid sterility. …
- Pre-copulatory mechanisms hauv tsiaj.
Yuav ua li cas piv txwv ntawm thaj chaw cais tawm?
Peographic cais tawm
Piv txwv li, Ib qho dej khov tuaj yeem tso rau hauv lub hav, tsim kom muaj ob pawg neeg sib cais, ib qho ntawm ob sab ntawm lub glacier. Dej hiav txwv nce toj tuaj yeem tig ib ceg av qab teb mus rau hauv ib txoj hlua ntawm cov Islands tuaj, tso cov kab ntawm lawv txhua tus.
Kev sib cais ntawm kev sib deev yog dab tsi?
Kev sib cais tawm tuaj yeem tshwm sim los ntawm tiv thaiv cov tib neeg ntawmcais hom los ntawm mating(kev cais ua ntej) lossis los ntawm kev xaiv tawm tsam hybrids (postmating isolation).
