Cov txheej txheem:
Video: Qhov tsis tu ncua ntawm kev hloov pauv hauv lej yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov tas li ntawm variation yog tus lej uas hais txog ob qhov sib txawv uas ncaj qha proportional lossis inversely proportional rau ib leeg.
Ua raws li qhov no hauv kev txiav txim siab, koj ua li cas thiaj nrhiav tau qhov kev hloov pauv tas mus li?
Vim k tas li (zoo ib yam rau txhua lub ntsiab lus), peb tuaj yeem pom k thaum muab ib qho taw qhia los ntawm kev faib y-coordinate los ntawm x-coordinate. Piv txwv li, yog tias y sib txawv ncaj qha li x, thiab y = 6 thaum x = 2, tus tas li ntawm variation yog k = = 3. Yog li, cov kev sib npaug piav txog qhov no ncaj qha variation y = 3x.
Ib yam li ntawd, lub ntsiab lus ntawm kev hloov pauv hauv lej yog dab tsi? Kev hloov pauv . Kev hloov pauv teeb meem cuam tshuam nrog kev sib raug zoo yooj yim lossis cov qauv , suav nrog ib qho kev hloov pauv tau sib npaug rau ib lub sijhawm. Thaum ib qho kev sib txawv nce ntxiv rau lwm qhov txo qis hauv kev faib ua ke kom cov khoom tsis hloov pauv.
Tom qab ntawd, qhov tsis tu ncua hauv lej yog dab tsi?
Tus nqi ruaj khov. Hauv Algebra, a tas li yog tus lej ntawm nws tus kheej, lossis qee zaum ib tsab ntawv xws li a, b lossis c los sawv cev rau tus lej. Piv txwv li: hauv "x + 5 = 9", 5 thiab 9 yog qhov tsis tu ncua. Saib: Variable. Algebra - Lus txhais.
Koj pom qhov kev hloov pauv hauv lej li cas?
Txhawm rau xam qhov sib txawv ua raws cov kauj ruam no:
- Ua haujlwm tawm Qhov Ntsuas (qhov nruab nrab yooj yim ntawm cov lej)
- Tom qab ntawd rau txhua tus lej: rho tus Mean thiab square qhov tshwm sim (qhov sib txawv squared).
- Ces ua hauj lwm tawm qhov nruab nrab ntawm cov squared sib txawv. (Vim li cas Square?)
Pom zoo:
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
Dab tsi yog qhov kev hloov pauv ntawm cov khoom uas txav ntawm qhov chaw mus rau qhov chaw ntawm - 12 m?
Kev piav qhia: Qhov kev txav ntawm ib qho khoom txav ntawm qhov chaw mus rau qhov chaw ntawm − 12 m yog 12 meters. Qhov kev ncua deb ntawm lub hauv paus chiv keeb mus rau qhov siab tshaj plaws txoj hauj lwm yog hu ua displacement ntawm ib yam khoom. Qhov siab tshaj plaws kev hloov pauv ntawm cov khoom nyob rau hauv ib nthwv dej yog hu ua crest thiab qhov tsawg kawg nkaus hloov pauv yog hu ua trough
Dab tsi yog qhov txawv ntawm kev tswj thiab qhov tsis tu ncua hauv kev tshawb fawb?
Qhov sib txawv ntawm qhov tsis tu ncua thiab Tswj Ib qhov hloov pauv tsis tu ncua tsis hloov. Ib qho kev tswj hwm qhov sib txawv ntawm lwm qhov kev hloov pauv, tab sis txhob txwm ua kom tas mus li thoob plaws qhov kev sim kom qhia txog kev sib raug zoo ntawm kev vam thiab kev ywj pheej
Puas yog tus ntiv tes yog qhov hloov pauv tsis tu ncua lossis tsis txuas ntxiv?
Kev hloov pauv tsis tu ncua yog qhov sib txawv, thiab cov no yog cov yam ntxwv ntawm caj ces hloov, xws li qhov siab, xim plaub hau, khau loj. Koj qhov siab, qhov hnyav, ntiv tes ntev thiab lwm yam, yuav tau hloov pauv hauv koj lub neej (nruam), tab sis koj hom ntshav, hom pob ntseg, ntiv tes thiab poj niam txiv neej, tsis txhob (tsis txuas ntxiv)
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