Video: Cov txiaj ntsig ntawm kev hloov pauv yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum a kev hloov pauv Hloov cov protein uas ua lub luag haujlwm tseem ceeb hauv lub cev, kev kho mob tuaj yeem ua tau tshwm sim . Ib txhia kev hloov pauv Hloov cov noob DNA hauv ib theem zuj zus tab sis tsis txhob hloov cov haujlwm ntawm cov protein ua los ntawm cov noob.
Thiab cov lus nug yog, dab tsi yog qhov cuam tshuam ntawm kev hloov pauv?
Los ntawm tib lub token, txhua qhov kev hloov pauv hauv cov noob DNA yuav ua rau muaj qhov tshwm sim protein ntau uas tsis ua haujlwm ib txwm lossis yuav tsis ua haujlwm txhua. Cov kev hloov pauv zoo li no yuav ua rau muaj kev phom sij. Kev hloov pauv tsis zoo yuav ua rau muaj kab mob caj ces lossis mob qog noj ntshav. Kab mob caj ces yog ib yam kab mob tshwm sim los ntawm kev hloov pauv hauv ib lossis ob peb lub noob.
Kuj Paub, dab tsi yog kev hloov pauv muaj txiaj ntsig? Cov kab mob kis tau kev hloov pauv thoob plaws hauv lawv lub neej. Cov no kev hloov pauv yog kev hloov pauv rau lawv cov caj ces, lossis DNA. Txawm li cas los xij, nyob rau lub sijhawm, a kev hloov pauv tshwm sim uas yog muaj txiaj ntsig mus rau lub cev. Cov no kev hloov pauv tau zoo suav nrog tej yam xws li lactose kam rau ua, nplua nuj xim tsis pom kev thiab, nyob rau hauv ib co, tiv thaiv kab mob HIV.
Ib yam li ib tug yuav nug, yuav ua li cas thaum muaj kev hloov pauv hauv DNA?
Ib gene kev hloov pauv yog ib qho kev hloov pauv mus tas li hauv lub DNA ib ntus uas ua rau muaj cov noob, xws li cov kab ke sib txawv ntawm qhov muaj nyob hauv ntau tus neeg. Kev hloov pauv qhov loj me; lawv tuaj yeem cuam tshuam qhov twg los ntawm ib leeg DNA lub tsev thaiv (hauv paus khub) mus rau ib ntu loj ntawm chromosome uas suav nrog ntau cov noob.
Yuav ua li cas txiav txim seb qhov kev hloov pauv yog qhov zoo lossis qhov tsis zoo?
Tshaj li zoo thiab phem Feem ntau nws nyob ntawm cov ntsiab lus, piv txwv li seb tus kev hloov pauv pab cov kab mob no siv cov khoom noj tshwj xeeb lossis tawm tsam cov kab mob uas muaj nyob rau hauv nws lub neej. Thiab ib txhia kev hloov pauv tuaj yeem muaj txiaj ntsig yog tsuas yog ib daim ntawv luam tau txais, tab sis muaj teeb meem yog ob daim ntawv luam tau txais qub txeeg qub teg.
Pom zoo:
Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm kev taw qhia ntawm tes los ntawm kev sib cuag lub cev ncaj qha?
Kev taw qhia kuj tshwm sim ntawm cov hlwb uas yog kev sib cuag ntawm lub cev. Kev sib cuam tshuam ntawm cov proteins ntawm qhov chaw ntawm cov hlwb tuaj yeem ua rau muaj kev hloov pauv hauv cov cwj pwm ntawm tes. Piv txwv li, cov proteins nyob rau saum npoo ntawm T-cells thiab antigen nthuav tawm cov hlwb sib cuam tshuam los ua kom muaj kev taw qhia hauv T-cells
Dab tsi yog thaj chaw ntawm pej xeem kev hloov pauv thiab vim li cas nws thiaj li muaj txiaj ntsig thaum kawm txog pej xeem?
Population dynamics yog ceg ntawm lub neej sciences uas kawm txog qhov loj thiab hnub nyoog muaj pes tsawg leeg ntawm cov pejxeem raws li dynamical systems, thiab cov txheej txheem lom thiab ib puag ncig tsav lawv (xws li yug thiab tuag tus nqi, thiab los ntawm kev nkag teb chaws thiab emigration)
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 cov txiaj ntsig ntawm kev rho tawm ntawm cov lej?
Properties of Integers Integer Property Addition Subtraction Commutative Property x + y = y + x x – y ≠ y – x Associative Property x + (y + z) = (x + y) + z (x – y) – z ≠ x – (y – z) Identity Property x + 0 = x = 0 + x – 0 = x ≠ 0 – x Kaw Property x + y ∈ Z x – y ∈ Z
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