Qhov kub dependence ntawm dej ua hauj lwm txawv ntawm cov khoom. Qee cov khoom muaj zog dej ua haujlwm nrog qhov kub thiab txias, thaum lwm tus pom tias qhov txo qis nrog qhov kub thiab txias. Feem ntau cov khoom noj uas muaj dej noo muaj qhov tsis zoo hloov nrog qhov kub thiab txias. Kawg hloov kho: 2023-12-15 23:12
Txawm hais tias TiCl4 feem ntau yuam kev los ua ionic daim ntawv cog lus vim yog kev sib xyaw ua ke; hlau thiab tsis yog hlau, qhov tseeb nws yog covalent daim ntawv cog lus vim muaj qhov sib txawv me me hauv electronegativity ntawm ob lub ntsiab lus. Kawg hloov kho: 2023-12-15 23:12
Cov tshuaj sib npaug yuav tsum sib npaug kom nws ua raws li txoj cai ntawm kev txuag ntawm huab hwm coj. Ib qho kev sib npaug tshuaj sib npaug tshwm sim thaum tus naj npawb ntawm cov atoms sib txawv ntawm cov ntsiab lus hauv cov reactants sab sib npaug ntawm cov khoom sab. Kev sib npaug tshuaj sib npaug yog cov txheej txheem ntawm kev sim thiab ua yuam kev. Kawg hloov kho: 2023-12-15 23:12
Magnetic Screen. Ib lub thawv los yog rooj plaub ntawm cov hlau mos, raws li tuab raws li kev siv tau, rau kev tiv thaiv lub cev hauv nws los ntawm kev ua ntawm cov hlau nplaum. Cov kab ntawm kev quab yuam kom zoo nyob rau hauv cov hlau ntawm lub thawv ntawm tus account ntawm nws cov permeability, thiab tab sis ib qho piv txwv ntawm lawv hla qhov chaw hauv nws. Kawg hloov kho: 2023-12-15 23:12
Nyob rau hauv nautical navigation tus txheeb ze bearing ntawm ib yam khoom yog lub clockwise lub kaum sab xis ntawm lub taub hau ntawm lub nkoj mus rau ib tug ncaj kab kos los ntawm qhov chaw soj ntsuam ntawm lub nkoj mus rau cov khoom. Txij li thaum Tsov Rog Ntiaj Teb Zaum II, cov txheeb ze ntawm cov ntsiab lus sib txawv no tau raug thiab raug ntsuas kom zoo rau ib leeg. Kawg hloov kho: 2023-12-15 23:12
Nitrogen yog tus lej 7. Siv lub sijhawm no, peb pom cov atomic loj ntawm nitrogen yog 14.01 amu lossis 14.01 g / mol. Kawg hloov kho: 2023-12-15 23:12
Nrhiav cov pa roj carbon monoxide nrog plaub pawg sib txuas los txheeb xyuas cov chaw muaj peev xwm chiral. Kos koj cov molecule nrog wedges thiab dashes thiab kos ib daim iav duab ntawm lub molecule. Yog hais tias lub molecule nyob rau hauv daim iav duab yog tib molecule, nws yog achiral. Yog hais tias lawv yog txawv molecules, ces nws yog chiral. Kawg hloov kho: 2023-12-15 23:12
Cov qauv ntawm lipid bilayer tso cai me me, tsis muaj cov khoom siv xws li oxygen thiab carbon dioxide, thiab hydrophobic molecules xws li lipids, kom dhau los ntawm cov cell membrane, cia lawv cov concentration gradient, los ntawm kev yooj yim diffusion. Kawg hloov kho: 2023-12-15 23:12
Transcription yuav siv sij hawm qhov chaw nyob rau hauv peb kauj ruam: pib, elongation, thiab termination. Cov kauj ruam tau piav qhia hauv daim duab hauv qab no. Initiation yog qhov pib ntawm transcription. Nws tshwm sim thaum lub enzyme RNA polymerase khi rau thaj tsam ntawm cov noob hu ua tus txhawb nqa. Kawg hloov kho: 2023-12-15 23:12
Thaum photosynthesis raug tso tseg tom qab ob vib nas this, cov khoom siv hluav taws xob tseem ceeb yog PGA, uas yog vim li no tau pom tias yog thawj qhov chaw ruaj khov tsim thaum lub sij hawm carbon dioxide fixation hauv cov nroj tsuag ntsuab. PGA yog peb-carbon compound, thiab hom ntawm photosynthesis yog li hu ua C3. Kawg hloov kho: 2023-12-15 23:12
Binary acids yog qee cov molecular tebchaw uas hydrogen ua ke nrog cov khoom thib ob uas tsis yog xim hlau; Cov kua qaub no suav nrog HF, HCl, HBr, thiab HI. HCl, HBr, thiab HI yog tag nrho cov muaj zog acids, whereas HF yog ib tug tsis muaj zog acid. Hydrochloric acid yog pom nyob rau hauv gastric acid. Nws yog ib tug tswv cuab ntawm binary acids. Kawg hloov kho: 2023-12-15 23:12
Lub ntsiab lus ntawm lub nceeg vaj tsiaj .: ib pab pawg ntawm cov khoom ntuj tsim uas suav nrog tag nrho cov tsiaj nyob thiab cov uas ploj lawm - piv rau lub nceeg vaj ntxhia, cog lub nceeg vaj. Kawg hloov kho: 2023-12-15 23:12
Yog hais tias lub plhaub los yog pob txha yog faus nyob rau hauv sediment, nws dissolves qeeb dua. Cov plhaub tau khaws cia yam tsis tau yaj tsuas yog thaum lawv faus rau hauv cov pob zeb uas muaj calcium carbonate cov zaub mov, zoo li limestones. Cov pob txha loj tshaj plaws yog cov plhaub ntawm cov tsiaj hiav txwv zoo li clams, qwj, lossis corals. Kawg hloov kho: 2023-12-15 23:12
Xyoo 1953, Asmeskas cov kws tshawb fawb Stanley Miller thiab Harold Urey tau teeb tsa los sim txoj kev xav ntawm cov kua zaub ua ntej. Lawv kaw methane, ammonia, hydrogen thiab dej hauv qhov kaw kaw. Tom qab ntawd lawv ntxiv cov hluav taws xob txuas ntxiv mus simulate xob laim. Kawg hloov kho: 2023-12-15 23:12
Cov txiv neej tau hais tias yog hemizygous vim lawv tsuas muaj ib qho allele rau ib qho X-txuas yam ntxwv; Cov txiv neej yuav nthuav tawm qhov zoo ntawm cov noob ntawm X-chromosome tsis hais txog kev tswj hwm thiab kev rov ua haujlwm. Feem ntau cov kev sib deev sib txuas yog qhov tseeb X-txuas, xws li qhov muag xim hauv Drosophila lossis xim dig muag hauv tib neeg. Kawg hloov kho: 2023-12-15 23:12
Lub colorimeter yog ib qho cuab yeej uas sib piv cov nqi ntawm lub teeb uas tau txais los ntawm kev daws teeb meem nrog tus nqi uas tuaj yeem tau txais los ntawm cov qauv ntawm cov kuab tshuaj ntshiab. Cov tshuaj nqus lub teeb rau ntau yam laj thawj. Pigments nqus lub teeb ntawm qhov sib txawv wavelength. Kawg hloov kho: 2023-12-15 23:12
Ntau hom kev siv zog xws li lub teeb, cua sov, suab, hluav taws xob, nuclear, tshuaj lom neeg, thiab lwm yam tau piav qhia luv luv. Txawm hais tias muaj ntau yam tshwj xeeb ntawm lub zog, ob hom loj yog Kinetic Energy thiab Peev Xwm Muaj Peev Xwm. Kinetic zog yog lub zog hauv cov khoom txav los yog loj. Kawg hloov kho: 2023-12-15 23:12
Ideal Gas Law. Ib qho roj zoo tagnrho txhais tau tias yog ib qho uas txhua qhov kev sib tsoo ntawm cov atoms lossis cov molecules zoo kawg nkaus eleastic thiab uas tsis muaj qhov cuam tshuam rau lub zog. Ib tug tuaj yeem pom nws raws li ib qho kev sau ntawm cov spheres zoo kawg nkaus uas sib tsoo tab sis uas tsis muaj kev cuam tshuam nrog ib leeg. Kawg hloov kho: 2023-12-15 23:12
Qhov sib txawv yog qhov sib txawv ntawm qhov ntom ntom lossis qhov sib txawv ntawm qhov greyness ntawm cov cheeb tsam ntawm cov duab hluav taws xob. Nws yog qhov tseem ceeb tshaj plaws uas ua rau muaj qhov sib txawv. Cov khoom siv ntom ntom ntau dua yuav ua rau x-rays ntau dua li cov khoom siv qis dua. Kawg hloov kho: 2023-12-15 23:12
Nyob ruaj ruaj-theem. Noun. (pluralstationary phases) (chemistry) Cov khoom los yog kua theem ntawm chromatography system uas cov ntaub ntawv yuav tsum tau sib cais yog xaiv adsorbed. Kawg hloov kho: 2023-12-15 23:12
Peb Hom Dej. Cov dej ntshiab yog tsis qab, tsis muaj ntxhiab, thiab tsis muaj xim. Dej tuaj yeem tshwm sim hauv peb lub xeev: khoom (dej), kua, lossis roj (vapor). Dej khov - dej khov yog dej khov. Kawg hloov kho: 2023-12-15 23:12
Tej yam yooj yim staining tuaj yeem siv rau txhua hom kab mob hlwb los muab qhov sib piv rau lwm yam tsis muaj xim ntawm tes txhawm rau txiav txim siab txog cell morphology, qhov loj me, thiab kev sib koom tes ntawm tes. Cov txheej txheem no yooj yim vim tsuas yog siv ib qho zas xim thiab ncaj qha vim tias lub xov tooj tiag tiag yog xim. Kawg hloov kho: 2023-12-15 23:12
Kev ntsuas tsis ncaj. Ib daim ntawv thov ntawm daim duab peb sab zoo sib xws yog ntsuas qhov ntev tsis ncaj. Koj tuaj yeem siv txoj kev no los ntsuas qhov dav ntawm tus dej lossis hav txwv yeem lossis qhov siab ntawm qhov khoom siab. Lub tswv yim yog tias koj ua qauv qhov xwm txheej nrog cov duab peb sab zoo sib xws thiab tom qab ntawd siv cov proportions los nrhiav qhov kev ntsuas uas ploj lawm. Kawg hloov kho: 2023-12-15 23:12
Txhais tau tias 'inorganic phosphate', uas yog ib lo lus siv nyob rau hauv biology los piav txog ib tug phosphate ion uas yog dawb nyob rau hauv kev daws. Qhov no yog qhov sib txawv rau ib qho organophosphate, uas yog phosphate ion ester sib txuas rau cov khoom siv roj ntsha, xws li ATP lossis DNA (qhov twg ib txwm cov tub ntxhais kawm thawj zaug ntsib nws). Kawg hloov kho: 2023-12-15 23:12
Daim ntawv teev cov tsev Bases & Acids Baking Soda. Baking soda yog lub npe nrov rau sodium bicarbonate, paub tshuaj raws li NaHCO3. Diluted Soaps. Tsev neeg Ammonia. Tsev Neeg Vinegar. Citric Acid. Kawg hloov kho: 2024-01-18 08:01
Thaj tsam thaj tsam rau qhov ntim piv. Kawg hloov kho: 2023-12-15 23:12
Cov khoom khib nyiab. Kawg hloov kho: 2023-12-15 23:12
Thaum lub sab qaum teb ib nrab ntawm lub ntiaj teb yog tilted mus rau lub hnub, lub sab qab teb hemisphere yog tilted. Cov neeg nyob rau yav qab teb hemisphere tau ntsib lub hnub luv luv thiab txias dua ntawm lub caij ntuj no. Thaum lub caij nplooj zeeg thiab caij nplooj ntoos hlav, qee qhov chaw hauv ntiaj teb muaj kev zoo sib xws, me me, muaj xwm txheej. Kawg hloov kho: 2023-12-15 23:12
Linear, exponential, thiab quadratic functions yuav siv tau los ua qauv phenomena ntawm lub ntiaj teb tiag. Algebraically, linear functions yog polynomial functions nrog lub siab tshaj plaws exponent ntawm ib tug, exponential functions muaj ib tug txawv txav nyob rau hauv lub exponent, thiab quadratic functions yog polynomial functions nrog ib tug siab tshaj exponent ntawm ob. Kawg hloov kho: 2023-12-15 23:12
Nplooj ntawv no saib ntawm kev tsim cov cawv los ntawm kev tso dej ncaj qha ntawm alkenes - ntxiv dej ncaj qha rau carbon-carbon ob daim ntawv cog lus. Ethanol yog tsim los ntawm reacting ethene nrog chav. Cov tshuaj tiv thaiv yog thim rov qab. Tsuas yog 5% ntawm ethene hloov mus rau hauv ethanol ntawm txhua qhov dhau los ntawm lub reactor. Kawg hloov kho: 2023-12-15 23:12
Tag nrho cov kev ncua, suav nrog ntxhib emulsions, yog qhov tseeb ntawm thermodynamically tsis ruaj khov. Lawv yuav, los ntawm random motion ntawm cov hais thaum lub sij hawm, aggregate vim hais tias ntawm lub ntuj thiab tseem ceeb nyiam kom txo tau qhov loj tshwj xeeb deg cheeb tsam thiab tshaj nto zog. Kawg hloov kho: 2023-12-15 23:12
Kas fes tsis yog. Koj tuaj yeem hloov pauv zoo nkauj ntau yam tsis suav tus lej rau hauv tus lej suav tau los ntawm kev ntxiv animplied countable noun. "Sand" yog ib qho tsis suav. Tab sis "grain" yog suav tau. Kawg hloov kho: 2023-12-15 23:12
Qhov kawg electron txais yog NADP. Nyob rau hauv oxygenic photosynthesis, thawj electron pub yog dej, tsim oxygen raws li cov khoom pov tseg. Nyob rau hauv anoxygenic photosynthesis ntau electron pub siv. Cytochrome b6f thiab ATP synthase ua haujlwm ua ke los tsim ATP. Kawg hloov kho: 2023-12-15 23:12
Hauv biology, lo lus "phenotype" txhais tau tias yog cov yam ntxwv pom tau thiab ntsuas tau ntawm lub cev los ntawm kev sib cuam tshuam ntawm cov noob ntawm lub cev, ib puag ncig yam, thiab kev hloov pauv tsis sib xws. Daim duab no (Punnett square) qhia txog kev sib raug zoo ntawm phenotype thiab genotype. Kawg hloov kho: 2023-12-15 23:12
GM yog ib qho cuab yeej siv los ntxig DNA rau hauv genome ntawm cov kab mob. Txhawm rau tsim cov nroj tsuag GM, DNA tshiab hloov mus rau hauv cov nroj tsuag. Feem ntau, cov hlwb tom qab ntawd loj hlob hauv cov ntaub so ntswg uas lawv loj hlob mus rau hauv cov nroj tsuag. Cov noob uas tsim los ntawm cov nroj tsuag no yuav tau txais cov DNA tshiab. Kawg hloov kho: 2023-12-15 23:12
Lub nucleus yog qhov chaw ntawm lub atom. Nws yog tsim los ntawm nucleons hu ua (protons thiab neutrons) thiab nyob ib puag ncig los ntawm huab cua electron. Kawg hloov kho: 2023-12-15 23:12
Cov pab pawg tshwj xeeb no tau sau ua ke hu ua kev faib tawm ntawm cov khoom muaj sia. Kev faib tawm ntawm cov khoom muaj sia muaj xws li 7 qib: lub nceeg vaj, phylum, chav kawm, kev txiav txim, tsev neeg, genus, thiab hom. Qhov tseem ceeb tshaj plaws ntawm cov khoom muaj sia nyob yog lub nceeg vaj. Tam sim no muaj tsib lub nceeg vaj. Kawg hloov kho: 2023-12-15 23:12
Yuav ua li cas tshwm sim nyob rau hauv tus txheej txheem ntawm kev xaiv ntuj? Kev xaiv ntuj tshwm sim nyob rau hauv txhua qhov xwm txheej uas cov tib neeg yug los ntau dua li tuaj yeem muaj sia nyob (kev tawm tsam rau lub neej), muaj kev hloov pauv ntawm ntuj tsim (variation thiab adaptation), thiab muaj kev sib txawv ntawm cov tib neeg (kev ciaj sia taus ntawm fittest.). Kawg hloov kho: 2023-12-15 23:12
Mendelian qub txeeg qub teg: Tus yam ntxwv ntawm cov noob thiab cov yam ntxwv tau dhau los ntawm niam txiv mus rau lawv cov menyuam. Cov hom ntawm Mendelian qub txeeg qub teg yog autosomal dominant, autosomal recessive, X-txuas tseem ceeb, thiab X-txuas recessive. Kuj hu ua classical lossis yooj yim genetics. Kawg hloov kho: 2023-12-15 23:12
Lassen (los yog Lassen Peak) volcano nyob rau sab qaum teb California yog nyob rau sab qab teb kawg ntawm Cascade Range. Dhau li ntawm Mt St. Helens, nws yog tib lub roob hluav taws hauv Teb Chaws Asmeskas uas tau tawg rau xyoo pua 20th. Kawg hloov kho: 2023-12-15 23:12