Qhov sib txawv ntawm thaj chaw thiab kev sib cais yog qhov kev sib cais ntawm thaj chaw yog ib pawg ntawm kev sib cais ntawm cov menyuam yaus uas hais txog kev sib cais ntawm cov tib neeg ntawm cov kab mob los ntawm kev sib deev lossis sib pauv lawv cov khoom siv caj ces los ntawm thaj tsam ntawm lub cev thaum kev sib deev kev sib cais yog hais txog cov txheej txheem. ntawm cov txheej txheem uas tiv thaiv cov tsiaj los ntawm mating thiab tsim fertile offspring.
Fertilization yog kev sib koom ua ke ntawm cov phev thiab qe los tsim ib lub diploid zygote thaum lub sij hawm kev sib deev. Yog hais tias tus tsim zygote yog mature, nws nws thiaj li loj hlob mus rau ib tug noj qab nyob zoo fertile xeeb leej xeeb ntxwv. Yog li ntawd, kev sib cais ntawm kev sib deev yog ib qho txheej txheem uas tiv thaiv kev tsim ntawm cov xeeb ntxwv. Qhov kev tiv thaiv no tuaj yeem tshwm sim thaum lub sij hawm fertilization los yog tom qab fertilization. Txawm li cas los xij, thaum kawg, nws tsim qhov thaiv kom tsim tau cov xeeb ntxwv uas muaj peev xwm yug tau lwm tus xeeb ntxwv. Ntawm cov txheej txheem sib txawv, qhov kev sib cais ntawm thaj chaw yog qhov tseem ceeb ntawm kev sib cais ntawm kev sib deev.
Kev cais thaj chaw yog dab tsi?
Kev cais thaj chaw yog hais txog kev sib cais ntawm cov tsiaj sib raug zoo los ntawm kev sib tw thiab tsim cov xeeb ntxwv los ntawm lub cev muaj zog xws li dej ntws, roob, thiab lwm yam. Nws yog ib hom kev sib cais ntawm cov menyuam yaus. Cov tsiaj tsis tuaj yeem sib sau ua ke vim qhov tseeb tias lawv nyob hauv ntau qhov chaw lossis hauv thaj chaw sib txawv.
Daim duab 01: Geographic Isolation
Thaum lawv nyob hauv ib puag ncig sib txawv, lawv tau txais cov yam ntxwv sib txawv thiab raug xaiv ntuj. Thaum kawg, lawv ua txawv. Qhov no tuaj yeem ua rau speciation. Thaum kawg, lawv evolve raws li ib tug sib txawv hom, thiab lawv poob lub peev xwm los tsim ib tug zoo sib xws. Piv txwv li, ob tus neeg nyob hauv ob lub tebchaws tsis tuaj yeem ua phooj ywg nrog ib leeg vim qhov kev sib cais ntawm thaj chaw no. Yog li ntawd, lawv zoo li yug me nyuam nrog cov tswv cuab uas nyob rau tib lub koog pov txwv. Qhov kev cais ntawm thaj chaw no tuaj yeem tshwm sim raws li kev sib tsoo lossis kev sib tsoo. Kev rho tawm los ntawm kev thaiv, kev sib cais los ntawm kev nyob deb, kev sib cais tom qab ib qho kev tshwm sim thiab kev sib cais los ntawm kev sib cais yog ob peb yam uas tuaj yeem ua rau thaj chaw sib cais.
Kev cais kev yug me nyuam yog dab tsi?
Kev sib cais cais tawm yog ib qho kev hloov pauv uas ua rau muaj qhov tshwj xeeb lossis tsim cov hom tshiab thiab txawv. Nws yog txheej txheej txheej txheem uas tiv thaiv cov tsiaj sib ze los ntawm kev yug me nyuam thiab tsim cov xeeb ntxwv. Yog li, lawv txoj kev sib raug zoo yuav raug thaiv los ntawm ntau yam.
Daim duab 02: Kev cais tawm ntawm kev sib deev
Yog li, kev cais tawm prezygotic thiab kev cais tawm tom qab yog ob pawg tseem ceeb ntawm kev sib cais ntawm kev sib deev. Prezygotic cais tawm tiv thaiv fertilization, thiab postzygotic cais tiv thaiv kev tsim ntawm cov xeeb ntxwv tom qab fertilization. Geographical isolation yog ib hom kev cais prezygotic. Kev rho tawm Postzygotic piav qhia qhov tsis muaj peev xwm ntawm cov zygote tsim los ua rau cov xeeb ntxwv fertile. Kev rho menyuam tawm yog qhov tseem ceeb rau kev txheeb xyuas. Speciation yog tsim ntawm hom tshiab nyob rau hauv cov chav kawm ntawm evolution. Vim muaj kev sib cais ntawm kev ua me nyuam thiab lub cev nqaij daim tawv thiab kev coj tus cwj pwm, speciation tshwm sim.
Dab tsi yog qhov Zoo sib xws ntawm Geographic thiab Reproductive Isolation?
- Kev cais thaj chaw yog ib hom kev sib cais ntawm kev sib deev.
- Ob leeg yog lub luag haujlwm rau speciation.
- thaj chaw thiab kev sib cais cais tawm tiv thaiv kev tsim cov xeeb ntxwv.
Dab tsi yog qhov txawv ntawm Geographic thiab Reproductive Isolation?
Kev cais thaj chaw yog ib hom kev sib cais ntawm kev sib deev. Yog li ntawd, tsis muaj ntau qhov sib txawv ntawm thaj chaw sib cais thiab kev sib cais ntawm cov menyuam yaus uas tsis yog qhov tshwj xeeb categorization vim yog cov txheej txheem ntawm kev sib cais. Geographic cais cais cov tib neeg ntawm cov tsiaj sib raug zoo los ntawm mating los ntawm thaj chaw teeb meem xws li roob, lub cev dej, thiab lwm yam. Kev sib cais yog ib qho kev sau ntawm cov txheej txheem, uas yog ib qho tseem ceeb rau speciation txhawm rau tiv thaiv ntau hom los ntawm kev tsim cov xeeb ntxwv.
Summary – Geographic vs Reproductive Isolation
Kev sib cais ntawm kev sib deev feem ntau yog ob hom; Prezygotic isolation thiab postzygotic cais. Prezygotic cais tawm tiv thaiv fertilization. Geographic cais tawm yog ib hom kev cais prezygotic nyob rau hauv uas lub cev muaj zog tiv thaiv kev sib ntsib ntawm cov tib neeg thiab mating nrog ib leeg. Qhov no yog qhov sib txawv ntawm thaj chaw nyob ib leeg thiab kev rho menyuam tawm.
