Cov pov thawj dab tsi txhawb nqa endosymbiosis?
Cov pov thawj dab tsi txhawb nqa endosymbiosis?

Video: Cov pov thawj dab tsi txhawb nqa endosymbiosis?

Video: Cov pov thawj dab tsi txhawb nqa endosymbiosis?
Video: yog hmoov dab tsi. Zoo Xyooj (cover) 2024, Kaum ib hlis
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Thawj daim ntawm pov thawj uas yuav tsum tau nrhiav kev txhawb nqa tus endosymbiotic Qhov kev xav yog seb puas los yog tsis yog mitochondria thiab chloroplasts muaj lawv tus kheej DNA thiab yog tias cov DNA no zoo ib yam li cov kab mob DNA. Qhov no tom qab tau ua pov thawj tias muaj tseeb rau DNA, RNA, ribosomes, chlorophyll (rau chloroplasts), thiab protein synthesis.

Ntawm no, cov pov thawj dab tsi txhawb lub tswv yim tias cov organelles loj ntawm eukaryotes yog ib zaug cov kab mob?

Cov pov thawj qhia tias cov chloroplast no organelles ua kuj ib zaug nyob dawb kab mob . Qhov kev tshwm sim endosymbiotic uas tsim mitochondria yuav tsum tau tshwm sim ntxov hauv keeb kwm ntawm eukaryotes , vim cwb eukaryotes muaj lawv.

Kuj Paub, cov pov thawj dab tsi txhawb cov keeb kwm endosymbiotic ntawm mitochondria thiab plastids? Muaj dav pov thawj los qhia tias mitochondria thiab plastids sawv los ntawm cov kab mob thiab ib qho kev sib cav muaj zog tshaj plaws rau txhawb cov endosymbiotic txoj kev xav yog ob qho tib si mitochondria thiab plastids muaj DNA uas txawv ntawm cov cell nucleus thiab lawv muaj lawv tus kheej protein biosynthesis machinery.

Ntawm no, cov pov thawj dab tsi txhawb txoj kev xav uas eukaryotes hloov zuj zus los ntawm cov hlwb prokaryotic?

Lub hypothesis uas eukaryotic hlwb hloov zuj zus los ntawm lub koom haum symbiotic ntawm prokaryotes -endosymbiosis - tshwj xeeb tshaj yog zoo txhawb nqa los ntawm kev tshawb fawb ntawm mitochondria thiab chloroplasts, uas xav tias muaj hloov zuj zus los ntawm cov kab mob nyob hauv loj hlwb.

Puas muaj pov thawj tias mitochondria hloov zuj zus los ntawm cov hlwb prokaryotic?

Mitochondria thiab chloroplasts ntseeg tau tias muaj tsim tawm los ntawm cov kab mob symbiotic, tshwj xeeb tshaj yog alpha-proteobacteria thiab cyanobacteria, feem. Cov txoj kev xav hais tias prokaryotic cell tau noj los yog engulfed los ntawm ib loj dua cell . Los ntawm qee qhov laj thawj tsis paub, cov prokaryotic organelle tsis tau noj.

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