Cov txheej txheem:
Video: Dab tsi yog qhov laj thawj tseem ceeb ntawm speciation?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov kws tshawb fawb xav tias thaj chaw nyob ib leeg yog ib txoj hauv kev rau cov txheej txheem ntawm kev tshwj xeeb pib: dej ntws hloov chaw, roob nce siab, sab av loj drift, kab mob migrate, thiab dab tsi yog ib zaug ib tug nruam pej xeem muab faib ua ob los yog ntau dua cov pejxeem.
Tsis tas li ntawd, speciation yog dab tsi thiab nws tsim li cas?
Kev txhais ntawm Qhov tshwj xeeb Hloov pauv, ' kev tshwj xeeb ' los yog cladogenesis tshwm sim los ntawm kev sib cais, qhov twg niam txiv hom tau muab faib ua ob hom sib txawv, feem ntau tshwm sim los ntawm thaj chaw cais lossis lwm qhov kev tsav tsheb uas cuam tshuam nrog kev sib cais ntawm cov neeg.
Ib yam li ntawd, plaub hom speciation yog dab tsi? Qhov tshwj xeeb . Muaj plaub loj variants ntawm kev tshwj xeeb : allopatric, peripatric, parapatric, thiab sympatric. Qhov tshwj xeeb yog li cas ib yam tshiab ntawm cov nroj tsuag los yog animalpecies yog tsim. Qhov tshwj xeeb tshwm sim thaum ib pab pawg hauv aspecies cais los ntawm lwm cov tswv cuab ntawm nws hom thiab tsim nws tus kheej cov yam ntxwv.
Yog li, dab tsi yog qhov ua rau speciation Class 10?
Cov yam ntxwv uas cuam tshuam rau cov txheej txheem ntawm speciation yog:
- Geographical cais –
- Genetic drift -
- Ntuj xaiv –
Dab tsi yog speciation hauv evolution?
Qhov tshwj xeeb , tsim cov tshiab thiab txawv txawv nyob rau hauv lub chav kawm ntawm evolution . Qhov tshwj xeeb koom nrog kev sib cais ntawm ib leeg evolutionary kab mob mus rau ob los yog ntau tshaj genetic ywj siab lineages.
Pom zoo:
Dab tsi yog qhov laj thawj tseem ceeb ntawm lub dab dej?
Qhov feem ntau ua rau lub dab dej yog qhov hloov pauv hauv cov dej hauv av los yog nce sai sai hauv cov dej saum npoo av. Lub dab dej dab dej feem ntau tshwm sim thaum cov dej nag uas muaj kua qaub nkag los ntawm cov av thiab cov xuab zeb kom txog rau thaum nws mus txog rau lub pob zeb soluble xws li ntsev, limestone lossis sandstone
Dab tsi yog qhov laj thawj tseem ceeb uas koj tuaj yeem hnov lub suab nrov nyob deb ntawm dej thaum hmo ntuj?
Qhov kub thiab txias inversion yog vim li cas vim li cas lub suab tuaj yeem hnov ntau dua qhov kev ncua deb ntawm hmo ntuj tshaj li thaum nruab hnub - ib qho cuam tshuam feem ntau tsis raug rau kev puas siab puas ntsws tshwm sim thaum hmo ntuj nyob ntsiag to
Dab tsi yog ob qho laj thawj tseem ceeb ntawm kev mob caj ces hauv tib neeg?
Muaj peb hom kab mob caj ces: Ib hom kab mob ib leeg, qhov kev hloov pauv cuam tshuam rau ib lub noob. Sickle cell anemia yog ib qho piv txwv. Chromosomal disorders, qhov twg chromosomes (los yog ib feem ntawm chromosomes) ploj lawm los yog hloov. Cov kab mob nyuaj, qhov twg muaj kev hloov pauv hauv ob lossis ntau lub noob
Dab tsi yog ob qho laj thawj vim li cas photosynthesis tseem ceeb?
Photosynthesis yog cov nroj tsuag noj hauv dej, carbon dioxide, thiab lub teeb los ua suab thaj thiab oxygen. Qhov no tseem ceeb heev vim tias txhua yam muaj sia nyob xav tau oxygen kom muaj sia nyob. Txhua tus neeg tsim khoom tsim cov pa oxygen thiab qab zib rau cov neeg siv khoom thib ob thiab tom qab ntawd cov tsiaj txhu noj cov tsiaj uas noj cov nroj tsuag
Peb qhov laj thawj tseem ceeb ntawm kev hloov pauv hloov pauv yog dab tsi?
Allele frequencies nyob rau hauv ib tug pej xeem yuav hloov vim plaub lub hauv paus zog ntawm evolution: Natural Selection, Genetic Drift, Mutations thiab Gene Flow. Kev hloov pauv yog qhov kawg ntawm cov alleles tshiab hauv cov noob caj noob ces. Ob ntawm cov txheej txheem tseem ceeb tshaj plaws ntawm kev hloov pauv hloov pauv yog: Natural Selection thiab Genetic Drift