Video: Dab tsi tshwm sim hauv Paleozoic Era?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov poj koob yawm txwv ntawm conifers tshwm sim , thiab dragonflies kav lub ntuj. Tetrapods tau dhau los ua tshwj xeeb, thiab ob pawg tshiab ntawm tsiaj txhu hloov zuj zus. Thawj yog cov tsiaj reptiles, nrog rau lizards thiab nab. Qhov thib ob yog cov archosaurs, uas yuav ua rau crocodiles, dinosaurs thiab noog.
Ua li no, cov tsiaj twg nyob hauv Paleozoic Era?
Arthropods , molluscs, ntses, amphibians, synapsids thiab diapsids tag nrho cov hloov zuj zus thaum lub sij hawm Paleozoic. Lub neej pib nyob rau hauv dej hiav txwv tab sis nws thiaj li hloov mus rau hauv av, thiab los ntawm lub lig Paleozoic, nws tau dominated los ntawm ntau yam kab mob.
Kuj Paub, dab tsi tseem ceeb tshwm sim hauv Paleozoic Era? Paleozoic Era , kuj sau Palaeozoic , loj Lub sijhawm ntawm geological lub sij hawm uas pib 541 lab xyoo dhau los nrog lub Cambrian tawg, ib qho txawv txawv txawv ntawm marine tsiaj, thiab xaus li ntawm 252 lab xyoo dhau los nrog lub kawg-Permian extinction, qhov loj tshaj extinction. xwm txheej hauv ntiaj teb keeb kwm.
Cov lus nug tseem yog, dab tsi muaj nyob hauv Paleozoic Era?
Paleozoic Era : Lub Neej Tom Qab Paleozoic seas tau dominated los ntawm crinoid thiab blastoid echinoderms, articulate brachiopods, graptolites, thiab tabulate thiab rugose corals. Thaum kawg ntawm Paleozoic , cycads, glossopterids, primitive conifers, thiab ferns tau kis thoob plaws toj roob hauv pes.
Puas muaj pob txha pob txha tau pom nyob rau hauv Paleozoic Era?
Qee tus neeg sawv cev no suav nrog: arthropods ( Trilobites nyob txhua qhov chaw!), mollusks , Lophophorata ( Brachiopods ), tau tshwm sim yuav luag tam sim ntawd hauv Cambrian thaum Orthoceras-lub plhaub ncaj nraim- tuaj nyob ib ncig ntawm lub sijhawm Ordovician), cov echinoderms (Lub paj zoo li crinoid vam meej nyob rau hauv hiav txwv thoob plaws hauv Era.
Pom zoo:
Qhov twg tshwm sim thawj lub teeb nyob ntawm qhov tshwm sim lossis lub teeb ywj pheej?
Lub Teeb-Dependent thiab Lub Teeb-Independent Reactions. Cov tshuaj tiv thaiv lub teeb, lossis cov tshuaj tiv thaiv lub teeb-dependent, yog thawj zaug. Peb hu lawv ob leeg thiab ob lub npe. Nyob rau hauv lub teeb-dependent tshwm sim ntawm photosynthesis, lub zog ntawm lub teeb propels lub electrons los ntawm ib tug photosystem mus rau lub high-zog lub xeev
S sawv rau dab tsi thiab dab tsi tshwm sim hauv theem no?
S theem sawv rau 'Synthesis'. Qhov no yog theem thaum DNA replication tshwm sim. The G2 stage stands for 'GAP 2'
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Cov kauj ruam ntawm mitosis yog dab tsi thiab dab tsi tshwm sim hauv txhua qhov?
Mitosis muaj tsib theem sib txawv: interphase, prophase, metaphase, anaphase thiab telophase. Cov txheej txheem ntawm cell faib tsuas yog ua tiav tom qab cytokinesis, uas tshwm sim thaum lub sij hawm anaphase thiab telophase. Txhua theem ntawm mitosis yog tsim nyog rau cell replication thiab faib
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej