2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Tus qauv kwv yees no hu ua phyletic gradualism. Darwin lees paub tias phyletic gradualism tsis yog feem ntau qhia los ntawm cov ntaub ntawv fossil. … Txawm hais tias evolution yog ib tug qeeb txheej txheem los ntawm peb cov qauv, nws yog ceev txheeb ze rau tus nqi ntawm cov fossil deposits zoo.
Dab tsi yog gradualism raws li Darwin?
Nyob rau hauv natural sciences, gradualism yog txoj kev xav uas tuav qhov kev hloov pauv loj yog cov khoom sib txuas ntawm cov txheej txheem qeeb tab sis txuas ntxiv, feem ntau sib piv nrog kev puas tsuaj. … Charles Darwin tau raug cuam tshuam los ntawm Lyell Cov Ntsiab Cai ntawm Geology, uas tau piav qhia ob qho tib si txheej txheem thiab kev xav.
Dab tsi yog gradualism Ua li cas Darwin siv lub tswv yim ntawd rau kev hloov pauv ntawm lub neej?
Gradualism tau raug sau tseg rau tus cwj pwm uas Darwin tau hais txog keeb kwm ntawm ib hom los ntawm lwm lub sijhawm geological, lossis "kev hloov pauv" ntawm hom. … Ntau qhov kev pom zoo xws li Erwin thiab Anstey 1995 muab pov thawj rau gradualism piv rau stasis raws li cov qauv empirical hauv cov ntaub ntawv fossil.
Leej twg yog gradualism thov los ntawm?
Gradualism yog lub tsev kawm ntawm kev xav uas tau lees tias, thoob plaws ntiaj teb keeb kwm, geological thiab biological txheej txheem tau ua haujlwm ntawm tus nqi pom tam sim no. Hauv geology, gradualism feem ntau pom tau tias tau pib nrog James Hutton (1726–97).
Darwin puas xav tias evolution yog maj mam?
Charles Darwin nkag siab qhov ntawdevolution yog tus txheej txheem qeeb thiab maj mam. Los ntawm kev maj mam, Darwin tsis txhais hais tias "zoo kawg nkaus du," tab sis theej, "stepwise," nrog ib hom kev hloov zuj zus thiab sib sau me me hloov pauv mus rau lub sijhawm ntev mus txog thaum ib hom tshiab tau yug los. … Darwin nws tus kheej tau shaken los ntawm lawv qhov tsis tuaj.
Pom zoo:
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).
Puas yog jurassic ntiaj teb hloov pauv hloov pauv hloov pauv?
Qee zaum, paub meej, koj yuav tau rov qab mus rau lub sijhawm dhau los - txuag manually, thiab feem ntau, raws li game's autosave yog… tsis zam txim - tab sis feem ntau ntawm cov lub sijhawm koj tuaj yeem khaws cov khoom thiab khaws cia nrog.
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.
