Video: Peb qhov laj thawj tseem ceeb ntawm kev hloov pauv hloov pauv yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Allele frequencies nyob rau hauv ib tug pej xeem tej zaum yuav hloov vim 4 tsim nyog zog of 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 feem ntau cuam tshuam mechanisms ntawm evolutionary hloov yog: Natural Selection thiab Genetic Drift.
Tsis tas li ntawd, kev hloov pauv hloov pauv yog dab tsi?
Hauv biology, evolution yog cov hloov nyob rau hauv cov yam ntxwv ntawm ib hom ntau ntau tiam neeg thiab tso siab rau cov txheej txheem ntawm ntuj xaiv. Evolution vam tias muaj kev hloov pauv caj ces? nyob rau hauv cov pejxeem uas cuam tshuam rau lub cev yam ntxwv (phenotype) ntawm ib tug kab mob.
Kuj Paub, dab tsi yog 3 lub hauv paus ntsiab lus ntawm kev hloov caj ces? Peb qhov chaw ntawm kev hloov caj ces yog kev hloov pauv , genetic recombination thaum lub sij hawm kev sib deev kev sib deev thiab lateral hloov mus rau genetic.
Ua li no, peb yam tseem ceeb uas yuav tsum tau muaj rau evolution yog dab tsi?
Plaub yam yuav tsum tau muaj rau natural xaiv tshwm sim: kev yug me nyuam, heredity, variation nyob rau hauv lub cev los yog kab mob, variation nyob rau hauv ib tug neeg cim ntawm cov tswv cuab ntawm cov pejxeem. Yog lawv ntsib, natural xaiv txiav txim.
Ib qho piv txwv ntawm evolution yog dab tsi?
Evolution Piv txwv hauv Ntuj. Peppered npauj - Cov npauj no muaj lub teeb xim tsaus nti tom qab Kev Lag Luam Kev Lag Luam, vim muaj kuab paug ntawm lub sijhawm. Qhov kev hloov pauv no tau tshwm sim vim tias lub teeb xim npauj tau pom los ntawm cov noog tau yooj yim dua, yog li nrog kev xaiv ntuj, cov npauj tsaus nti tau muaj sia nyob kom rov tsim dua.
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 qhov laj thawj tseem ceeb ntawm speciation?
Cov kws tshawb fawb xav tias qhov kev sib cais ntawm thaj chaw yog ib txoj hauv kev rau cov txheej txheem ntawm speciation pib: cov dej hloov pauv, cov roob nce siab, cov teb chaws drift, cov kab mob txav mus los, thiab dab tsi yog ib zaug cov pej xeem tsis tu ncua tau muab faib ua ob lossis ntau dua cov neeg me
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 qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation