Video: Vim li cas Glossopteris thiaj li nthuav?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lawv yog yog li ntawd ntau rau yog li ntawd ntev uas tsub zuj zuj ntawm cov nroj tsuag tuag nws thiaj li tsim loj coal txaj uas yog mined nyob rau hauv Brazil, India, Australia thiab South Africa thiab kuj pom nyob rau hauv Antarctica.
Yog li ntawd, dab tsi yog qhov tseem ceeb ntawm Glossopteris?
Qhov tseem ceeb, Glossopteris tau txwv rau nruab nrab- thiab siab-latitude qhov chaw ntawm Gondwana thaum lub sij hawm Permian thiab yog ib qho tseem ceeb contributor rau qhov loj heev Permian thee deposits ntawm Southern Hemisphere continents.
Qhov thib ob, thaum twg Glossopteris nyob? 300 txog 200 lab xyoo dhau los
Yog li ntawd, vim li cas Glossopteris thiaj li tuag?
Lub Permian kev ploj mus yuav tsum tau tshwm sim los ntawm ntau volcanoes erupting nyob rau hauv tam sim no Siberia, clouding lub ntiaj teb thiab tua ntau lub neej. 90 ko taw (30 meters) noob ferns yuav tsis zoo li muaj sia nyob, tshwj xeeb tshaj yog tam sim no kev sib tw tuaj yeem tuaj thiab tshem tawm cov fern.
Glossopteris fossils nyob qhov twg?
Nce mus txog siab li 30 meters, Glossopteris tau tshwm sim thaum lub sijhawm Permian thaum ntxov (299 lab xyoo dhau los) thiab tau los ua cov nroj tsuag tseem ceeb hauv av kom txog thaum kawg ntawm Permian. Glossopteris fossil muaj nyob hauv Australia , Antarctica , Is Nrias teb , South Africa , thiab South America -Txhua lub teb chaws yav qab teb.
Pom zoo:
Vim li cas dej thiaj nkag rau daim ntawv piav qhia qhov no?
Cov dej nkag mus rau ntawm daim ntawv vim kev ua haujlwm capillary. Qhov no yog thaum kev sib txuas ntawm cov kua molecules rau lawv tus kheej tsawg dua qhov kev nyiam rau lwm yam khoom uas cov molecules tau kov. Cov sodium bitartrate muaj sodium ion, peb pawg hydroxyl, thiab ob daim ntawv cog lus ob npaug
Vim li cas Mollality nyiam dua molarity hauv kev nthuav qhia qhov concentration ntawm cov tshuaj?
Molarity yog tus naj npawb ntawm moles ib chav tsev ntim ntawm cov tshuaj thiab molality yog tus naj npawb ntawm moles ib chav tsev loj ntawm hnyav. Volume yog qhov kub thiab txias nyob qhov twg raws li huab hwm coj yog tas li ntawm txhua qhov kub. Yog li, molality tseem nyob tas li tab sis molarity hloov nrog kub. Yog li, molality yog nyiam dua molarity
Yuav ua li cas yog vim li cas vim li cas lub epigenome hloov?
Kev ua neej nyob thiab ib puag ncig (xws li kev haus luam yeeb, noj zaub mov thiab kab mob sib kis) tuaj yeem ua rau tus neeg muaj kev ntxhov siab uas ua rau muaj tshuaj lom neeg. Cov lus teb no, dhau los, feem ntau ua rau muaj kev hloov pauv hauv epigenome, qee qhov tuaj yeem ua rau puas tsuaj
Puas muaj peev xwm hluav taws xob thiab lub zog muaj peev xwm tib yam Vim li cas lossis vim li cas ho tsis?
Lub zog muaj peev xwm hluav taws xob Ue yog lub zog muaj peev xwm khaws cia thaum cov nqi tawm ntawm qhov sib npaug (xws li lub zog muaj peev xwm gravitational). Lub peev xwm hluav taws xob zoo ib yam, tab sis ib tus nqi, Ueq. Ib qho hluav taws xob muaj peev xwm sib txawv ntawm ob lub ntsiab lus hu ua voltage, V = Ue2q−Ue1q
Yuav ua li cas muaj pes tsawg tus noob sib xyaw ua tau hauv gamete ntau lawm rau Dihybrid cross Vim li cas thiaj muaj ntau?
Muaj peev xwm gametes rau txhua tus niam txiv AaBb Txij li thaum txhua tus niam txiv muaj plaub qhov sib txawv ntawm cov alleles hauv gametes, muaj kaum rau kev sib txuas ua ke rau tus ntoo khaub lig no