Video: Hom kab mob tshwm sim li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tag nrho hom los yog kab mob muaj keeb kwm los ntawm cov txheej txheem ntawm biological evolution. Nyob rau hauv cov tsiaj reproduces kev sib deev, nrog rau tib neeg, lub sij hawm hom yog hais txog ib pab pawg neeg uas cov neeg laus tsis tu ncua interbreed, ua rau cov xeeb ntxwv xeeb tub - uas yog, cov xeeb ntxwv lawv tus kheej muaj peev xwm rov tsim dua.
Tsis tas li ntawd, hom tsiaj twg tib neeg tau hloov zuj zus los ntawm?
Tsis muaj. Tib neeg yog ib hom ntawm ob peb nyob hom ntawm zoo apes. Tib neeg evolved nrog rau orangutans, chimpanzees, bonobos, thiab gorillas. Tag nrho cov no qhia txog cov poj koob yawm txwv ua ntej txog 7 lab xyoo dhau los.
Qhov thib ob, tib neeg puas hloov zuj zus los ntawm cov nroj tsuag? Evolutionary biologists feem ntau pom zoo tias tib neeg thiab lwm hom tsiaj uas muaj sia nyob yog nqis los ntawm cov kab mob xws li poj koob yawm txwv. Tab sis ua ntej txog ob billion xyoo dhau los, tib neeg poj koob yawm txwv ceg. Cov pab pawg tshiab no, hu ua eukaryotes, kuj tau ua rau lwm tus tsiaj, nroj tsuag , fungi thiab protozoans.
Yog li ntawd, vim li cas lub hauv paus chiv keeb ntawm hom tseem ceeb?
Darwin tus ' Keeb kwm ntawm Hom ' cov npe saum toj kawg nkaus tseem ceeb phau ntawv kawm. Sau ntau tshaj li 150 xyoo dhau los, nws yog ib phau ntawv uas txhawb tib neeg txoj kev xav txog qhov lawv tuaj ntawm qhov twg, tawm tsam ntau txhiab xyoo ntawm kev ntseeg dogma thiab ua rau tib neeg xav tsis thoob tias puas muaj Vajtswv tiag.
Dab tsi pib evolution?
Nyob rau hauv thaum ntxov 19th caug xyoo Jean-Baptiste Lamarck (1744-1829) tau npaj nws txoj kev xav ntawm kev hloov ntawm hom, thawj qhov kev xav ntawm evolution. Xyoo 1858 Charles Darwin thiab Alfred Russel Wallace tau luam tawm ib txoj kev xav tshiab evolutionary, piav qhia meej hauv Darwin's On the Origin of Species (1859).
Pom zoo:
Tus qauv yuav pab nrhiav qhov tshwm sim ntawm qhov kev tshwm sim sib xyaw li cas?
Lub ntsiab lus ntawm Qhov Muaj Peev Xwm Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej yog ib qho uas muaj ntau tshaj li qhov ua tau. Kev txiav txim siab qhov yuav tshwm sim ntawm qhov kev tshwm sim sib xyaw suav nrog kev nrhiav cov lej ntawm qhov tshwm sim ntawm tus kheej cov xwm txheej thiab, yog tias tsim nyog, tshem tawm qhov muaj feem sib tshooj
Hom kab mob dab tsi tshwm sim hauv lub voj voog ntawm tes?
Hauv cov hlwb eukaryotic, lossis cov hlwb nrog lub nucleus, cov theem ntawm lub voj voog ntawm tes tau muab faib ua ob theem loj: interphase thiab mitotic (M) theem
Yuav ua li cas koj pom qhov tshwm sim ntawm qhov tshwm sim tsawg kawg ib zaug?
Txhawm rau xam qhov tshwm sim ntawm qhov tshwm sim tshwm sim tsawg kawg ib zaug, nws yuav yog qhov sib ntxiv ntawm qhov xwm txheej tsis tshwm sim. Qhov no txhais tau hais tias qhov tshwm sim ntawm qhov tshwm sim yeej tsis tshwm sim thiab qhov tshwm sim ntawm qhov tshwm sim tsawg kawg ib zaug yuav sib npaug, lossis 100% txoj hauv kev
Cov kab mob puas yog ib hom kab mob ntawm tes?
Teb thiab piav qhia: Cov kab mob no tsis suav tias yog cov cell nyob thiab yog li ntawd tsis yog ib leeg-celled lossis ntau-celled. Lawv tsuas yog suav hais tias yog cov plhaub protein
Vim li cas cov kab mob Gram tsis zoo tshwm liab liab thaum cov kab mob Gram zoo pom ntshav liab?
Gram zoo hlwb stain ntshav vim lawv cov peptotidoglycan txheej yog tuab txaus, txhais tau tias tag nrho cov kab mob Gram zoo yuav khaws lawv cov stain. Gram tsis zoo hlwb stain liab vim lawv muaj ib tug nyias peptidoglycan phab ntsa, thiab lawv yuav tsis khaws ib yam ntawm cov ntshav stain los ntawm crystal violet