Cov txheej txheem:
Video: Dab tsi yog ob hom kev sib cais mechanisms?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub teb ntawm biology piav qhia " muab cais nyob ib leeg "raws li tus txheej txheem uas ob hom uas tuaj yeem tsim cov xeeb ntxwv hybrid raug tiv thaiv los ntawm kev ua li ntawd. Muaj tsib muab cais nyob ib leeg cov txheej txheem uas tiv thaiv ob hom los ntawm interbreeding: ecological, temporal, cwj pwm, mechanical / tshuaj thiab thaj chaw.
Ib yam li ntawd, tib neeg nug, 3 hom kev cais tawm yog dab tsi?
Cov txheej txheem no suav nrog physiological lossis systemic teeb meem rau fertilization
- Kev cais ib ntus lossis chaw nyob.
- Kev cais tus cwj pwm.
- Mechanical cais.
- Gametic cais.
- Zygote tuag thiab tsis muaj kev vam meej ntawm hybrids.
- Hybrid sterility.
- Pre-copulatory mechanisms nyob rau hauv cov tsiaj.
Ib qho tseem yuav nug, qhov kev sib xyaw ua ke yog ib qho piv txwv ntawm Prezygotic mechanisms ntawm kev sib cais? Prezygotic Barriers: Txhua yam uas tiv thaiv mating thiab fertilization yog ib prezygotic mechanism . Habitat muab cais nyob ib leeg , kev coj cwj pwm muab cais nyob ib leeg , kev cais tawm ntawm lub cev , mechanical muab cais nyob ib leeg thiab gametic muab cais nyob ib leeg yog tag nrho piv txwv ntawm prezygotic isolating mechanisms.
Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog cov txheej txheem cais tawm?
Isolating mechanisms yog txoj hauv kev uas cov kab mob sib cais tau ntev txaus los txhim kho mus rau qhov sib txawv hom . Isolating mechanisms txhawb kev speciation. Qee qhov piv txwv muaj xws li thaj chaw, lub cev nqaij daim tawv, kev coj cwj pwm, thiab kev sib cais ntawm kev yug me nyuam.
Postmating isolation yog dab tsi?
POSTMATING ISOLATION . Postmating cais tiv thaiv kev ua tiav fertilization thiab. kev loj hlob, txawm tias mating yuav tshwm sim. Piv txwv li, tej yam kev mob nyob rau hauv lub cev xeeb tub ntawm ib tug poj niam yuav tsis txhawb.
Pom zoo:
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