Gametes yog tsim los ntawm cov txheej txheem ntawm kev faib cell hu ua meiosis. Txoj kev faib ob-kauj ruam no ua rau plaub tus ntxhais haploid hlwb. Haploid cells tsuas muaj ib pawg chromosomes xwb. Thaum cov txiv neej thiab poj niam haploid sib sau ua ke hauv cov txheej txheem hu ua fertilization, lawv tsim qhov hu ua zygote
Yog lawm, vim txhua tus neeg muaj ob 'genes' rau hom ntshav. Yog li ntawd, ob tug niam txiv uas muaj hom ntshav A lossis B, yog li ntawd, tuaj yeem tsim tau tus menyuam muaj ntshav hom O. Yog tias lawv ob leeg muaj AO lossis BO noob, txhua tus niam txiv tuaj yeem pub cov noob O rau cov xeeb ntxwv. Tom qab ntawd cov xeeb ntxwv yuav muaj OO noob, ua rau lawv cov ntshav hom O
Daim duab qhia chaw lossis daim duab kos yog cov duab kos duab ntawm qhov kev qhia qhov muaj nuj nqis lossis cov khoom raug pom hauv daim duab kos rau saum daim duab qhia chaw yooj yim. Cov duab kos duab, uas qhia txog qhov taw tes lossis thaj chaw, tsis yog ua raws li qhov tseeb tab sis raug muab tso rau kom raug
60 ntiv Tom qab ntawd, qhov nruab nrab nag lossis daus hauv hav zoov deciduous yog dab tsi? Tom qab rainforests, temperate deciduous hav zoov yog qhov thib ob-rainiest biome . Cov nruab nrab xyoo los nag yog 30 - 60 nti (75 - 150 cm).
Lwm lub khw muag khoom loj kuj tau hloov lawv lub ntsiab punnet loj los ntawm 400g rau 300g
Valence bond (VB) theory yog achemical bonding theory uas piav qhia txog kev sib txuas ntawm ob lub atoms. Ob lub atoms sib koom ib leeg lub hnub ci hluav taws xob los ua ib lub orbital los tsim ib daim ntawv cog lus hybrid orbitaland ua ke. Sigma thiab pi daim ntawv cog lus yog ib feem ntawm kev sib raug zoo txoj kev xav
71 xyoo (Lub Kaum Ib Hlis 26, 1948)
Teem koj lub multimeter mus rau qhov siab tshaj plaws kuj muaj. Kev ua haujlwm tsis kam yog feem ntau qhia los ntawm lub cim cim rau kev tiv thaiv: Greek tsab ntawv omega (Ω), lossis qee zaum los ntawm lo lus "ohms." Kov ob lub ntsuas ntsuas ntawm koj lub ntsuas ntsuas ua ke. Thaum koj ua, lub 'meter' yuav tsum sau npe 0 ohms ntawm qhov tsis kam
29 Tsis tas li ntawd, muaj pes tsawg protons neutrons thiab electrons muaj tooj liab? Tooj liab muaj tus lej atomic ntawm 29 , yog li nws muaj 29 proton thiab 29 electrons. Qhov hnyav atomic (tej zaum hu ua atomic mass) ntawm ib lub atom yog kwv yees los ntawm cov lej ntawm cov protons thiab cov naj npawb ntawm cov neutrons hauv lub nucleus ntawm lub atom.
Lub luag haujlwm tseem ceeb ntawm photosynthesis yog hloov lub zog ntawm lub hnub mus rau hauv lub zog tshuaj rau zaub mov. Tsuas yog qee cov nroj tsuag siv chemosynthesis, tag nrho cov nroj tsuag thiab tsiaj txhu hauv ntiaj teb ecosystem yog qhov kawg nyob ntawm cov suab thaj thiab carbohydrates uas tsim los ntawm cov nroj tsuag los ntawm photosynthesis
Cov atoms ntawm molecules yog txuas ua ke los ntawm cov tshuaj tiv thaiv hu ua chemical bonding. Atomic qauv ntawm cov pa roj carbon atom uas qhia cov khoom ntawm ib lub atom: protons, electrons, neutrons. Thaum ib tug hydrogen atom poob nws ib tug electron
Stannic oxide
Xyoo 1953, tus kws tshawb fawb Stanley Miller tau ua ib qho kev sim uas yuav piav qhia txog qhov tshwm sim ntawm lub ntiaj teb qub qub billions xyoo dhau los. Nws xa hluav taws xob los ntawm lub hwj ntawm cov tshuaj tov tshuaj methane, ammonia, hydrogen thiab dej. Qhov no tsim cov organic tebchaw nrog rau cov amino acids
Ferric oxalate Cov Npe Molar mass 375.747 g/mol Tswb daj daj khoom (anhydrous) Txiv qaub ntsuab khoom (hexahydrate) Cov ntxhiab tsw tsw Solubility hauv dej me ntsis soluble
Lub levee (/ˈl?vi/), dike, dyke, embankment, floodbank los yog stopbank yog ib tug elongated ib txwm tshwm sim ridge los yog artificially tsim sau los yog phab ntsa uas tswj cov qib dej. Nws feem ntau yog av thiab feem ntau sib npaug mus rau txoj kev ntawm tus dej hauv nws qhov dej nyab los yog raws ntug dej hiav txwv qis
Yog tias biomolecule yog (biochemistry) molecules, xws li amino acids, qab zib, nucleic acids, proteins, polysaccharides, dna, thiab rna, uas tshwm sim nyob rau hauv cov kab mob nyob rau hauv thaum macromolecule yog (chemistry | biochemistry) ib tug loj heev molecule, tshwj xeeb tshaj yog siv nyob rau hauv lub cev. siv rau cov khoom siv roj ntsha loj (xws li nucleic
Centromere Functions Ib txoj haujlwm tseem ceeb ntawm lub centromere yog koom nrog tus muam chromatids. Ntawm txhua chromatid, lub kinetochore cov ntaub ntawv ntawm thaj tsam centromere ntawm DNA. Thaum tag nrho cov chromatids txuas mus rau mitotic spindle, cov microtubules rub tus muam chromatids sib nrug mus rau hauv ob lub neej yav tom ntej ntxhais
Tsiaj-zoo li protists hu ua protozoa.Nroj zoo li protists hu ua algae. Lawv suav nrog ib leeg-celled diatoms thiab multicellular seaweed. Zoo li cov nroj tsuag, lawv muaj chlorophyll thiab ua zaub mov los ntawm photosynthesis. Hom algae muaj xws li liab thiab ntsuab algae, euglenids, anddinoflagellates
Redwoods tuaj yeem topped, tshwj xeeb tshaj yog tias tsob ntoo me me, zoo li cov uas koj piav qhia, thiab cov txiav me me. Ntau tus yuav xav tias 30 ko taw tsis yog me me. Tab sis qhov ntawd tsuas yog ib feem kaum ntawm nws qhov siab muaj peev xwm. Redwood yog zoo yoog rau topping
Clausius-Clapeyron equation - piv txwv. Xam cov mole feem ntawm cov dej (qhov hnyav). Xsolvent = nwater / (nglucose + nwater). Molar loj ntawm cov dej yog 18 g / mol, thiab cov piam thaj yog 180.2 g / mol. nWs = 500/18 = 27.70 mol. nglucose = 100/180.2 = 0.555 mol. Xsolvent = 27.70 / (27.70 + 0.555) = 0.98 TZS
Qhov xwm txheej ntawm cov kab hlau nplaum nyob ib ncig ntawm astright tam sim no nqa tus neeg xyuas pib yog concentric voj voog withcentre ntawm lub axis ntawm tus neeg xyuas pib. Ces koj cov ntiv tes yuav qhwv ib ncig ntawm tus neeg xyuas pib nyob rau hauv cov kev taw qhia ntawm lub teb kab ntawm lub magnetic teb? (Saib daim duab 1)?.Qhov no hu ua txoj cai ntiv tes xoo
Proteins ua los ntawm dab tsi? Lub tsev blocks ntawm cov proteins yog cov amino acids, uas yog cov organic molecules me me uas muaj cov alpha (central) carbon atom txuas mus rau ib pawg amino, pawg carboxyl, hydrogen atom, thiab cov khoom sib txawv hu ua cov saw hlau sab (saib hauv qab)
Lub hnub puas muaj qhov chaw ruaj khov, thiab qhov twg los yog vim li cas ho tsis? (a) Yog, nws ua li no: cov khoom saum npoo yog muab zais hauv qab qhov pom 'sov,' qhov twg lub siab siab dua. (b) Tsis yog, nws tsis yog: Lub hnub feem ntau yog cov kua hydrogen, tsuas yog cov txheej txheej sab nrauv xwb, cov duab hluav taws xob, yog cov roj
Cov tub ceev xwm lees paub 4 Tornadoes Los Ntawm Michigan Lub Limtiam Cua daj cua dub Cov tub ceev xwm lees paub plaub lub cua daj cua dub tau kov hauv Michigan Sab Qab Teb Kaus Lim Qab Teb thaum lub asthiv, tsoo ntoo thiab ua rau lub tsev puas tsuaj. Tsis muaj zog tornadoes ntaus Northern Michigan Lub Tebchaws Huab Cua Kev Pabcuam Tebchaws tau lees paub ob lub cua daj cua dub tsis muaj zog ntaus sab qaum teb Michigan
Cov axes ntawm ob-dimensional Cartesian system faib lub dav hlau mus rau hauv plaub thaj tsam tsis kawg, hu ua quadrants, txhua tus bounded los ntawm ob ib nrab-axes. Thaum cov axes raug kos raws li kev cai lej, tus lej mus rau counter-clockwise pib los ntawm sab xis sab xis ('sab qaum teb') quadrant
Lub luag haujlwm tag nrho ntawm cov tshuaj tiv thaiv lub teeb, thawj theem ntawm photosynthesis, yog hloov lub hnub ci zog rau hauv cov tshuaj siv hluav taws xob nyob rau hauv daim ntawv ntawm NADPH thiab ATP, uas yog siv nyob rau hauv lub teeb-yooj yim tshuaj tiv thaiv thiab roj sib sau ua ke ntawm qab zib molecules
Cov dej nag nruab nrab ntsuas 0.10 txog 0.30 ntiv tes los nag ib teev. Cov dej nag hnyav yog ntau tshaj 0.30 ntiv tes los nag ib teev. Cov dej nag tau piav qhia raws li qhov tob ntawm cov dej mus txog hauv av, feem ntau yog ntiv tes lossis millimeters (25 hli sib npaug ib nti). Ib nti nag yog raws nraim li ntawd, dej uas yog ib nti tob
Biodiversity suav nrog peb hom tseem ceeb: kev sib txawv hauv hom (genetic diversity), nruab nrab ntawm hom (species diversity) thiab nruab nrab ntawm ecosystems (ecosystem diversity)
Lub ntsiab lus ntawm Qhov Muaj Peev Xwm Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej yog ib qho uas muaj ntau tshaj li qhov ua tau. Kev txiav txim siab qhov yuav tshwm sim ntawm qhov kev tshwm sim sib xyaw suav nrog kev nrhiav cov lej ntawm qhov tshwm sim ntawm tus kheej cov xwm txheej thiab, yog tias tsim nyog, tshem tawm qhov muaj feem sib tshooj
Qhov tshwm sim theem (90%, 50%, 10%) yog lub caij nyoog ntawm qhov kub thiab txias mus rau hauv qab qhov pib tom qab hnub kawg Frost los yog ua ntej thawj hnub te. 1. Txoj Kev USDA Hardiness Zone. Hnub Kawg Frost Hnub Tim Thawj Frost Hnub Tim 3 Lub Tsib Hlis 1-16 Lub Cuaj Hli 8-15 4 Lub Plaub Hlis 24 - Tsib Hlis 12 Lub Cuaj Hli 21 - Lub Kaum Hli 7
Thaum ob lub hnub qub neutron orbit ib leeg ze, lawv muab kauv sab hauv raws li lub sij hawm dhau mus vim muaj hluav taws xob gravitational. Thaum lawv sib ntsib, lawv txoj kev sib koom ua ke ua rau muaj qhov hnyav dua neutron lub hnub qub lossis lub qhov dub, nyob ntawm seb qhov loj ntawm cov seem tshaj qhov txwv Tolman-Oppenheimer-Volkoff
Dalton qhov kev sim ntawm cov pa roj tau coj mus rau nws qhov kev tshawb pom tias tag nrho lub siab ntawm kev sib xyaw ntawm cov pa roj muaj qhov sib npaug ntawm cov kev ntxhov siab ib nrab uas txhua tus neeg siv roj tawm thaum nyob hauv tib qhov chaw. Nyob rau hauv 1803 no scientific txoj cai tau officially hu ua Dalton's Law of Partial Pressures
Lub xeev ntawm cov xaim hauv ib cheeb tsam yog ib qho ua rau muaj teeb meem voltage. Hnub nyoog thiab corrosion yog ib qho ua rau tsis tshua muaj hluav taws xob, xws li kev sib txuas qias neeg thiab kev rwb thaiv tsev tsis zoo. Kev ua haujlwm tsis zoo lossis kev puas tsuaj splicing tuaj yeem ua rau. Cov teeb meem tsis tshua muaj hluav taws xob tuaj yeem yog qhov tshwm sim kom txog thaum cov xov hlau hloov pauv
Ohm Txoj Cai yog ib qho qauv siv los xam cov kev sib raug zoo ntawm qhov hluav taws xob, tam sim no thiab tsis kam nyob rau hauv hluav taws xob Circuit Court. Rau cov tub ntxhais kawm ntawm electronics, Ohm's Law (E = IR) yog ib qho tseem ceeb raws li Einstein's Relativity equation (E = mc²) yog rau physicists
Vim nws muaj ntau yam xwm txheej thiab muaj pes tsawg leeg, ECM tuaj yeem ua haujlwm ntau yam, xws li muab kev txhawb nqa, cais cov ntaub so ntswg los ntawm ib leeg, thiab tswj kev sib txuas lus intercellular. Lub extracellular matrix tswj ib tug cell tus cwj pwm dynamic
Nyob rau theem qis tshaj plaws ntawm lub zog, qhov ze tshaj plaws rau lub atomic center, muaj ib qho 1s orbital uas tuaj yeem tuav 2 electrons. Nyob rau theem tom ntej lub zog, muaj plaub orbitals; ib 2s, 2p1, 2p3,. Txhua ntawm cov orbitals tuaj yeem tuav 2 electrons, yog li tag nrho ntawm 8 electrons tuaj yeem pom nyob rau theem ntawm lub zog
Ib qho kev ntsuas ntsuas (feem ntau hu ua 'lab tshuav nyiaj li cas'.) yog ib chav kawm ntawm qhov sib npaug tsim los ntsuas qhov loj me hauv cov kab hauv qab milligram. Lawv siv lub tshuab hluav taws xob los tsim lub zog los tiv thaiv cov qauv ntsuas thiab tso tawm qhov tshwm sim los ntawm kev ntsuas lub zog xav tau kom ua tiav qhov sib npaug
Tsob ntoo Haiv neeg rau Arizona (nruab nrab ntawm 4,500 ko taw thiab 6,000 ko taw) boxelder maple (Acer negundo) dej birch (Betula occidentalis) netleaf hackberry (Celtis laevigata var. western redbud (Cercis orbiculata) Arizona cypress (Cupress) april (Cupress) tshauv (Fraxinus velutina)
Hloov sab hauv cov ces kaum yog tsim los ntawm ib tug transversal intersecting ob parallel kab. Lawv nyob nruab nrab ntawm ob qho tib si kab tab sis nyob rau sab nraud ntawm lub transversal, tsim ob khub (plaub tag nrho cov ces kaum) ntawm cov ces kaum sab hauv. Hloov cov ces kaum sab hauv yog congruent, txhais tau tias lawv muaj qhov sib npaug
Cov ntoo loj tshaj plaws hauv ntiaj teb yog General Sherman tus loj sequoia (Sequoiadendron giganteum) loj hlob hauv Sequoia National Park, California, Tebchaws Asmeskas. Nws sawv 82.6 m (271 ft) siab, muaj txoj kab uas hla ntawm 8.2 m (27 ft 2 hauv) (dbh) * thiab ib ncig ntawm kwv yees li 25.9 m (85 ft)