2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub sijhawm dhau mus, kev hloov caj ces tuaj yeem hloov pauv hom kev ua neej tag nrho, xws li nws noj dab tsi, nws loj hlob li cas, thiab nws tuaj yeem nyob qhov twg. Tib neeg evolution tau tshwm sim raws li kev hloov pauv caj ces tshiabnyob rau hauv cov poj koob yawm txwv thaum ntxov tau nyiam lub peev xwm tshiab los hloov pauv ib puag ncig thiab hloov pauv tib neeg txoj kev ua neej.
evolution cuam tshuam li cas rau lub neej txhua hnub?
Kev hloov pauv tau tshwm sim hauv peb lub neej niaj hnub, zoo li thaum peb ntes lossis tiv thaiv tus kab mob khaub thuas. Evolution kuj tseem ua lub luag haujlwm hauv qee yam ntawm peb cov teeb meem kev noj qab haus huv thoob ntiaj teb. Piv txwv li, human immunodeficiency virus (HIV), evolve sai dua li lub cev tiv thaiv kab mob tuaj yeem nrog nws.
evolution cuam tshuam rau tib neeg tus cwj pwm li cas?
Raws li cov kws tshawb fawb txog kev puas siab puas ntsws, cov qauv ntawm tus cwj pwm tau hloov zuj zus los ntawm kev xaiv ntuj tsim, tib yam li cov yam ntxwv ntawm lub cev tau hloov zuj zus. Vim yog kev xaiv ntuj tsim, kev coj tus cwj pwm hloov, lossis kev coj cwj pwm uas ua rau muaj kev loj hlob zuj zus, tau khaws cia thiab dhau los ntawm ib tiam mus rau lwm tiam.
evolution qhia peb txog dab tsi ntawm tib neeg?
Yog evolution zoo li tus tib neeg lub cev, lawv say , nws kuj zoo li tus neeg siab. Evolutionary psychologists describe "kev tsim" ntawm lub siab nyob rau hauv no txoj kev: Thawj ob-legged hominids tshwm sim tom qab lub sij hawm ntev ntawm lub ntiaj teb no txias kwv yees li plaub lab xyoo dhau los.
Yogtib neeg tseem evolve?
Nws yog kev xaiv lub siab uas ua rau kev xaiv ntuj tsim ('kev ciaj sia ntawm qhov haum') thiab nws yog qhov peb hloov mus rau hauv hom peb niaj hnub no. … Kev tshawb fawb noob caj noob ces pom tau tias uas tib neeg tseem hloov zuj zus.
Pom zoo:
Dab tsi yog qhov hloov pauv thiab hloov pauv hloov pauv?
Point mutations hloov ib leeg nucleotide. Frameshift kev hloov pauv yog ntxiv lossis tshem tawm ntawm nucleotides uas ua rau muaj kev hloov pauv hauv kev nyeem ntawv. frameshift thiab point mutation yog dab tsi? Ib qho kev hloov pauv cuam tshuam rau ib khub hauv paus.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
