Kab mob

Zoo Siab

• Hom kab mob
• Piv txwv ntawm cov kab mob
• Tseem ceeb
• Yam ntxwv
• Ua raws nrog:

Cov kab mob lawv yog cov muaj sia nyob unicellular thiab lawv yog cov kab mob prokaryotic. Qhov no txhais tau tias nws cov khoom siv caj ces, muab ob npaug tso ua ke ib puag ncig DNA molecule, tsis pub dawb hauv cytoplasm, tsis nyob hauv ib lub nucleus.

Txij li thaum microfossils thiab stromatolites (fossil colonies ntawm cov kab mob sib xyaw nrog cov zaub mov) tau pom nyob hauv cov av los ntawm ntau yam geological eras, thiab txawm tias hauv cov pob zeb sedimentary laus dua 3.5 billion xyoo, nws tau lees tias cov kab mob tau muaj txij li puag thaum ub los.

Ntau npaum li ntawd lawv tau muaj nyob rau lub ntiaj teb keeb kwm ntev uas tsis muaj lwm yam kev ua neej nyob. Qhov tseeb, cov kab mob tau qhia txog cov xwm txheej hloov pauv tseem ceeb heev.

• Saib kuj:Kab mob (biology)

Hom kab mob

Feem ntau nws txawv hnub no ua ob pawg loj:

• Cov kab mob: yog sawv cev los ntawm feem ntau nyob hauv ib puag ncig ntuj hnub no, nrog rau muaj cov qib sib txawv ntawm cov pa thiab cov txheej txheem sib txawv.
• Lub Archaea: evolutionary sawv cev a pawg yav dhau los, nrog cov metabolism tshwj xeeb hloov pauv mus rau qhov xwm txheej ib puag ncig hnyav, xws li tsis muaj oxygen (nco ntsoov tias, raws li kev tshawb fawb nruj, tsis muaj oxygen nyob hauv ntiaj chaw kom txog thaum zaub, cov pa oxygen zoo heev, tau tshwm sim), lossis cov ntsev ntau heev lossis ib puag ncig acidic thiab kub siab.

Qhov zoo evolutionary kev vam meej ntawm cov kab mob feem ntau yog vim lawv xav tsis thoob metabolic versatility. Nws tuaj yeem hais tau tias txhua qhov ua tau ntawm tau txais teeb meem thiab lub zog lawv muaj nyob hauv cov chav sib txawv ntawm cov kab mob.

• Saib kuj: Piv txwv ntawm Microorganisms

Piv txwv ntawm cov kab mob

Tseem ceeb

Cov kab mob Lawv muaj qhov tseem ceeb nyob rau hauv xwm, txij li lawv tau tshwm sim nyob rau hauv ntuj tsim ntawm cov ntsiab lus tseem ceeb tshaj plaws rau lub neej: nitrogen, carbon, phosphorus, sulfur, thiab lwm yam.

Tej zaum hloov cov organic mus rau cov tshuaj inorganic thiab hloov pauv. Thaum ntau cov kab mob ua rau muaj kab mob thiab ua rau muaj kab mob hauv cov nroj tsuag thiab tsiaj (suav nrog tib neeg).

Ntau lwm tus tau siv ntau yam cov txheej txheem kev lag luam, as ua ua zaub mov thiab dej haus cawv tshuaj, los ntawm tshuaj tua kab mob, lwm yam.

Yam ntxwv

Cov kab mob Lawv yog lub tshuab me me thiab sab nraum daim nyias nyias uas ntim lawv cov cytoplasm muaj cov qauv hu ua phab ntsa ntawm tes. Ntau sab nraud tseem nyob, qee cov kab mob tsim cov qauv zoo li jelly tshuaj ntsiav.

Cov kab mob kis los ntawm binary fission thiab nrawm heev, yog li lawv muaj ntau heev. Vim lawv cov metabolism sib txawv, lawv tuaj yeem vam meej hauv ib puag ncig suav tsis txheeb xws li:

• Dej qab zib thiab qab ntsev
• Cov khoom siv organic
• Hauv av
• Txiv hmab txiv ntoo thiab nplej
• Nroj tsuag
• Tsiaj txhu, ob sab hauv thiab ntawm lawv qhov chaw

Ntau cov kab mob sib sau ua ke tsim ua khub, saw hlau lossis pob khoom; lawv feem ntau yog txawb; flagellum (ib hom tsiaj nrog qhov txuas ntxiv ntev) yog cov qauv uas feem ntau pab txhawb kev txav mus los, tab sis tsis yog ib leeg xwb. Cov kab mob hauv kab lis kev cai hu ua pawg.

Ua raws nrog:

• Piv txwv ntawm Gram Positive thiab Gram Negative Bacteria
  
• Piv txwv ntawm Cov Kab Mob Unicellular
• Piv txwv ntawm cov kab mob Prokaryotic thiab Eukaryotic