2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Tsawg kawg ib txhia, nws yog suav tias yog av-evolved, multicellularity tshwm sim los ntawm cov hlwb sib cais thiab rov qab ua dua(piv txwv li, cellular slime pwm) whereas rau feem ntau ntawm ntau hom cellular (cov uas evolved nyob rau hauv dej ib puag ncig), multicellularity tshwm sim raws li ib tug tshwm sim ntawm cov hlwb tsis cais raws li nram no …
Thaum twg cov kab mob sib kis tau tshwm sim?
Cov ntaub ntawv loj, ntau lub cev muaj sia tuaj yeem tshwm sim hauv ntiaj teb ib txhiab xyoo ua ntej tshaj li qhov tau xav yav dhau los. Macroscopic multicellular lub neej tau sau hnub tim rau thaj tsam 600 lab xyoo dhau los, tab sis cov pob txha tshiab qhia tias cov kab mob centimeters-ntev ntau cov kab mob muaj nyob rau thaum ntxov li 1.56 billion xyoo dhau los.
Cov kab mob ua li cas txhim kho ntau lub cell?
Plaub txheej txheem tseem ceeb los ntawm cov kab mob ntau lub cev tau tsim: cell proliferation, cell specialization, cell interaction, and cell move. Nyob rau hauv ib qho kev loj hlob embryo, tag nrho cov txheej txheem no tshwm sim ib zaug, nyob rau hauv ib tug kaleidoscopic ntau yam nyob rau hauv ntau qhov chaw ntawm lub cev.
Yuav ua li cas muaj ntau lub cellular tshwm sim hauv fungus?
Ntau tsev neeg cov noob koom nrog cell adhesion, tiv thaiv, fruiting lub cev pib thiab morphogenesistau khaws cia thoob plaws cov kab mob, qhia tias cov caj ces ua ntej rau kev ua haujlwm ntawm ntau lub cell muaj dav hauv uni- thiab yooj yim multicellular fungi.
Dab tsi ua rau muaj ntau lub neej ua rauform?
Lub ntiaj teb sov sov, nrog rau cov hiav txwv npog thaj av, tsim cov xwm txheej tsim nyog rau ntau cov kab mob hauv lub cev.
Pom zoo:
Qhov kev tua ntawm qhov kev sib raug zoo tshwm sim nyob qhov twg?
Kev phom sij ntawm O.K. Corral yog 30-thib ob qhov kev sib tua ntawm cov neeg tsim cai lij choj coj los ntawm Virgil Earp thiab cov tswv cuab ntawm ib pawg neeg tawm tsam hu ua Cowboys suav nrog Ike Clanton uas tshwm sim thaum 3:00 teev tsaus ntuj.
Thaum twg qhov kev rov tshwm sim tshwm sim?
Thaum Replevin tuaj yeem thov Li no, qhov no yog qhov xwm txheej tshwm sim ntau tshaj plaws uas yuav tshwm sim thaum tus neeg siv khoom tsis raug them nyiaj qiv tsheb. Kev ua txhaum cai ntawm kev thaj yeeb nyab xeeb yog me ntsis luv luv. Nws tsis suav nrog kev txeeb tsheb yam tsis tau ceeb toom lossis kub xov tooj kom tsav tsheb mus.
Qhov kev tshwm sim hauv lub neej tseem ceeb ntawm kev ntsuas kev ntsuas kev sib raug zoo twg muaj tus lej ntau tshaj?
Qhov kev tshwm sim ntawm qib siab tshaj yog tuag ntawm tus txij nkawm(nrog tus nqi nruab nrab ntawm 100), txheeb ze rau kev sib yuav, nrog tus nqi nruab nrab ntawm 50, thiab, piv txwv, kev tuag ntawm tus phooj ywg ze, uas tau qhab nia 37. Qhov xwm txheej tseem ceeb ntawm lub neej ntawm Kev Hloov Kho Kev Ntsuas Kev Ntsuas Qhov Ntsuas puas muaj cov lej hloov pauv lub neej ntau tshaj?
Yuav ua li cas txiav txim siab seb qhov kev tshwm sim yog tshwm sim los yog tsis ua raws li txoj cai?
Kev sib xyaw ua lej ntawm kev hloov pauv enthalpy thiab hloov pauv hloov pauv tso cai rau kev hloov pauv ntawm lub zog dawb los suav. A tawm tsam nrog tus nqi tsis zoo rau ΔG tso tawm lub zog dawb thiab yog li nws tus kheej. Cov tshuaj tiv thaiv nrog qhov zoo ΔG yog tsis ua raws li kev xav thiab yuav tsis nyiam cov khoom.
Puas tsis muaj qhov tshwm sim tshwm sim xav tau enzymes?
Tam sim no, enzymes TSIS ua rau cov tshuaj tiv thaiv tsis yog tus kheej. Txawm li cas los xij, enzymes ua kom nrawm nrawm ntawm cov tshuaj tiv thaiv tus kheej. Yeej, lawv ua kom cov tshuaj tiv thaiv sai dua. Enzymes ua qhov no los ntawm kev txo qis kev ua kom lub zog ntawm cov tshuaj tiv thaiv.
