Thaum lub sij hawm prophase, lub nucleus ploj, spindle fibers tsim, thiab DNA condenses rau hauv chromosomes (tus muam chromatids). Thaum lub sij hawm metaphase, tus viv ncaus chromatids ua raws li qhov sib npaug ntawm lub xov tooj ntawm tes los ntawm kev txuas lawv cov centromeres rau cov spindle fibers
Terrigenous sediment. Qhov chaw ntawm cov av qeeg muaj xws li cov roob hluav taws, huab cua ntawm cov pob zeb, cov plua plav cua tshuab, sib tsoo los ntawm cov dej khov, thiab cov dej ntws los ntawm cov dej ntws los yog cov dej khov
Tertiary qauv hais txog qhov chaw ntawm cov atoms nyob rau hauv peb-dimensional qhov chaw, coj mus rau hauv kev txiav txim siab geometrical thiab steric txwv. Nws yog ib qho kev txiav txim siab dua li cov qauv thib ob, uas loj-loj folding nyob rau hauv ib tug linear polymer tshwm sim thiab tag nrho cov saw yog folded rau hauv ib tug tshwj xeeb 3-dimensional duab
Feem ntau cov ntsuas hluav taws xob siv hauv kev lag luam muaj peev xwm nyeem tau ntau tshaj ib qho hluav taws xob yam ntxwv. Feem ntau siv hluav taws xob ntsuas yog volt-ohm-milliammeter thiab clamp-on ammeter nrog lub peev xwm los nyeem volts thiab ohms
Ib qho organelle (xav tias nws yog ib lub cell sab hauv lub cev) yog ib daim nyias nyias uas muaj nyob rau hauv ib lub cell. Ib yam li cov hlwb muaj daim nyias nyias los tuav txhua yam hauv, cov kab mob me me no tseem raug khi rau hauv ob txheej ntawm phospholipids kom insulate lawv cov khoom me me hauv cov hlwb loj
Teb thiab piav qhia: Cov tsiaj hlwb muaj cov vacuoles me me vim tias lawv tsis tas yuav khaws dej ntau npaum li lwm yam kab mob xws li cov nroj tsuag. Tsiaj cells siv lawv cov vacuoles rau
"Intermediate size" yog hais txog conifers uas loj hlob 6 mus rau 12 ntiv hauv ib xyoos, nrog rau feem ntau yog 6 mus rau 15 feet siab. Loj conifers loj hlob ntau dua 12 ntiv hauv ib xyoos, feem ntau ncav cuag 15 feet siab lossis siab dua
Hydrogen-bond tseem ua lub luag haujlwm tseem ceeb hauv cov qauv ntawm cov protein vim nws ruaj khov rau theem nrab, theem nrab thiab quaternary qauv ntawm cov proteins uas tsim los ntawm alpha helix, beta nplooj ntawv, lem thiab loops. Cov hydrogen-bond txuas cov amino acids ntawm cov sib txawv polypeptide chains hauv cov qauv proteins
Yuav Siv Gaussian Elimination li cas los daws cov kab ke sib npaug Koj tuaj yeem muab cov kab sib npaug los ntawm qhov tsis tu ncua (tsis yog xoom). multiplies kab peb los ntawm –2 muab rau koj ib tug tshiab kab peb. Koj tuaj yeem hloov ob kab. swaps kab ib thiab ob. Koj tuaj yeem ntxiv ob kab ua ke. ntxiv kab ib thiab ob thiab sau nws hauv kab ob
Qhov nruab nrab ntawm huab hwm coj yog ib txoj hauj lwm uas txhais tau tias txheeb ze rau ib qho khoom lossis qhov system ntawm cov khoom. Nws yog qhov nruab nrab txoj hauj lwm ntawm tag nrho cov qhov chaw ntawm lub cev, hnyav raws li lawv pawg. Rau cov khoom yooj yim nruj nrog qhov ntom ntom, qhov nruab nrab ntawm qhov loj yog nyob ntawm qhov nruab nrab
Cov lac, los yog lactose, operon muaj nyob rau hauv E. coli thiab lwm yam kab mob enteric. Qhov no operon muaj cov noob coding rau cov proteins uas thauj cov lactose rau hauv cytosol thiab zom nws mus rau hauv qabzib. Cov piam thaj no tom qab ntawd siv los ua kom muaj zog
Muaj nuj nqi hauv cov hlwb (los ntawm kev ua haujlwm ntawm lub twj tso kua mis ion, piv txwv li), cov kua dej yuav raug xa rov qab mus rau nws qhov qub concentration thiab lub xeev siab dawb zog. Cov twj tso kua mis tsis tu ncua txav sodium ions tawm ntawm lub cell thiab potassium ions mus rau hauv lub cell
Nyob rau hauv photosynthesis, lub teeb-dependent tshwm sim tshwm sim nyob rau hauv lub thylakoid daim nyias nyias. Sab hauv ntawm lub thylakoid membrane yog hu ua lub lumen, thiab sab nraum lub thylakoid daim nyias nyias yog lub stroma, qhov twg lub teeb-yooj yim tshwm sim tshwm sim
Cov pH ua haujlwm raws li qhov taw qhia uas sib piv qee cov dej-soluble ions. Cov txiaj ntsig ntawm kev ntsuas pH yog txiav txim siab los ntawm kev txiav txim siab ntawm tus naj npawb ntawm H + ions thiab tus naj npawb ntawm hydroxide (OH-) ions. Thaum tus naj npawb ntawm H + ions sib npaug ntawm OH-ions, cov dej tsis huv
Cov ntoo tshauv dub (Fraxinus nigra) yog nyob rau sab qaum teb sab hnub tuaj ntawm Tebchaws Meskas thiab Canada. Lawv loj hlob nyob rau hauv hav zoov swamps thiab wetlands. Raws li cov ntaub ntawv ntoo tshauv dub, cov ntoo loj hlob maj mam thiab loj hlob mus rau hauv siab, cov ntoo nrog cov nplooj zoo nkauj feather-compound
Lub nucleus yog ib qho organelle pom nyob rau hauv eukaryotic hlwb. Nyob rau hauv nws tag nrho enclosed nuclear membrane, nws muaj feem ntau ntawm cov cell cov khoom siv caj ces. Cov khoom no yog tsim raws li DNA molecules, nrog rau ntau yam ntawm cov proteins, tsim chromosomes
Planetary nebula yog ib qho khoom siv hnub qub uas muaj lub plhaub ci ntsa iab ntawm cov pa roj thiab cov ntshav uas tsim los ntawm qee hom hnub qub thaum kawg ntawm lawv lub neej. Lawv nyob rau hauv qhov tseeb tsis cuam tshuam rau cov ntiaj chaw; lub npe originates los ntawm ib tug supposed zoo sib xws nyob rau hauv tsos rau giant ntiaj chaw
Rau qhov tshwm sim kom siab tshaj plaws, ob qho tib si thevectors yuav tsum ua tib yam. Yog li ntawd lub kaum sab xis ntawm lawv yuav tsum yog 0 degrees
Mendeleyev paub zoo tshaj plaws rau nws qhov kev tshawb pom ntawm txoj cai lij choj, uas nws tau qhia hauv xyoo 1869, thiab rau nws qhov kev tsim ntawm lub sijhawm ntawm cov ntsiab lus. Nws tuag hauv St. Petersburg, Russia, thaum Lub Ob Hlis 2, 1907
Qhov loj thiab qhov loj ntawm cov molecules nyob rau hauv cov kua thiab ze npaum li cas lawv tau ntim ua ke txiav txim siab qhov ntom ntawm cov kua. Ib yam li cov khoom, qhov ntom ntawm cov kua sib npaug ntawm cov kua faib los ntawm nws qhov ntim; D = m/v. Qhov ceev ntawm cov dej yog 1 gram ib cubic centimeter
Lub coulomb yog txhais raws li qhov ntau ntawm hluav taws xob thauj hauv ib thib ob los ntawm qhov tam sim no ntawm ib ampere. Lub npe hu ua 18th-19th-xyoo pua Fabkis physicist Charles-Augustin de Coulomb, nws yog kwv yees li 6.24 × 1018 electrons
Sedimentary pob zeb
Youthful River: Cov dej uas ntws los saum toj roob hauv pes zoo li no yuav ntws nrawm heev. Tus dej ntws los ib tug gradient (slope). 2. Cov channel yog qhov tob dua li qhov dav thiab V-shaped vim yog qhov qis qis dua li lateral (sab-rau-sab) yaig
Thaum tshav kub kub ntawm cov tshuaj tiv thaiv, tus nqi ntawm cov cua sov uas yuav tsum tau ntxiv los yog tshem tawm thaum lub sij hawm cov tshuaj tiv thaiv nyob rau hauv thiaj li yuav khaws tag nrho cov khoom nyob rau hauv tib lub kub. Yog tias qhov kub ntawm cov tshuaj tiv thaiv yog qhov zoo, cov tshuaj tiv thaiv tau hais tias yog endothermic; yog hais tias tsis zoo, exothermic
Variables nyob rau hauv tus denominator txhais tau hais tias qhov sib txawv yog tus lej hauv qab ntawm ib feem. Kev daws teeb meem hauv tus lej nrog kev pab los ntawm tus kws qhia lej thiab tus kws qhia ntawv hauv qhov video dawb no
Ib qho atom tshwj xeeb yuav muaj tib tus naj npawb ntawm protons thiab electrons thiab feem ntau atoms muaj tsawg kawg yog ntau neutrons li protons. Lub ntsiab yog ib yam khoom uas yog tsim los ntawm ib hom atom. Lub compound yog ib yam khoom tsim los ntawm ob lossis ntau qhov sib txawv uas tau koom nrog cov tshuaj
Bleach thiab rubbing cawv = Toxic chloroform Ua pa ntau dhau tuaj yeem tua koj. Hydrochloric acid tuaj yeem muab tshuaj tua kab mob rau koj. Cov tshuaj tuaj yeem ua rau lub cev puas tsuaj thiab ua rau mob qog noj ntshav thiab lwm yam kab mob tom qab lub neej
Cov ntoo xibtes feem ntau loj hlob hauv thaj chaw sov thiab subtropical ntawm lub ntiaj teb. Lawv tshwm sim los ntawm 44 ° sab qaum teb latitude mus txog 44 ° sab qab teb latitude. Lub xibtes ntsias (Chamaerops humilis) tshwm sim nyob rau sab qab teb Fabkis, Nikau (Rhopalostylis sapida) yog hom xibtes loj hlob hauv New Zealand
Budding, feem ntau hu ua bud grafting, yog ib txoj kev dag ntawm asexual los yog vegetative propagation nyob rau hauv cov nroj tsuag. Zoo li grafting, txoj kev no yog ua haujlwm los hloov ib tsob nroj (cov cag ntoo) mus rau lwm hom nroj tsuag nrog cov yam ntxwv zoo. Tab sis nyob rau hauv grafting, tib daim ntawm qia no tsuas yog rau ib tug scion xwb
Index fossils yog siv nyob rau hauv lub formal architecture ntawm geologic lub sij hawm rau txhais lub hnub nyoog, epochs, lub sij hawm, thiab eras ntawm lub sij hawm geological. Cov pov thawj rau cov xwm txheej no tau pom nyob rau hauv cov ntaub ntawv fossil nyob qhov twg muaj qhov ploj ntawm pawg loj ntawm cov tsiaj hauv ib lub sijhawm luv luv ntawm geologically
Raws li hydrochloric acid ntxiv rau cov tshuaj potassium chromate, cov xim daj hloov mus rau txiv kab ntxwv. Thaum sodium hydroxide ntxiv rau cov tshuaj potassium chromate, cov xim txiv kab ntxwv tig rov qab mus rau daj. Cov sodium hydroxide reacts nrog hydrogen ions, tshem tawm lawv los ntawm kev daws
Karyotypes tuaj yeem siv rau ntau lub hom phiaj; xws li kawm chromosomal aberrations, cellular functions, taxonomic kev sib raug zoo, tshuaj thiab sau cov ntaub ntawv hais txog yav dhau los evolutionary txheej xwm.(karyosystematics)
Composite volcanoes muaj alternating txheej ntawm tshauv thiab lava ntws. Lub npe hu ua strato volcanoes, lawv cov duab yog lub khob hliav qab nrog cov sab siab uas nce siab txog 8,000 ko taw. Lawv tsim raws lub ntiaj teb subduction zones qhov twg ib lub phaj tectonic thawb rau hauv qab
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
Sister chromatids cais, thiab tam sim no tus ntxhais chromosomes txav mus rau cov ncej ntawm tes. Anaphase pib thaum cov centromeres duplicated ntawm txhua khub ntawm tus muam chromatids cais, thiab tam sim no-tus ntxhais chromosomes pib tsiv mus rau opposite ncej ntawm lub xovtooj ntawm tes vim qhov kev txiav txim ntawm spindle
Lub yim kauj ruam ntawm lub voj voog yog cov tshuaj lom neeg cov tshuaj tiv thaiv uas ua rau cov hauv qab no los ntawm txhua qhov ntawm ob lub molecules ntawm pyruvate uas ua rau ib molecule ntawm qabzib uas tau pib mus rau hauv glycolysis (Daim duab 3): 2 carbon dioxide molecules. 1 ATP molecule (los yog sib npaug)
SYSTEMS OF EQUATIONS. Ib qho kev sib npaug ntawm qhov sib npaug yog qhov sib sau ntawm ob lossis ntau qhov sib npaug nrog tib yam tsis paub. Hauv kev daws qhov system ntawm kev sib npaug, peb sim nrhiav qhov tseem ceeb rau txhua qhov tsis paub uas yuav ua rau txhua qhov sib npaug hauv qhov system
Ua cov xim pob tshab hauv R Cov lus txib rgb() yog tus yuam sij: koj txhais cov xim tshiab uas siv tus lej muaj nuj nqis (0–255) rau liab, ntsuab thiab xiav. Tsis tas li ntawd, koj tau teeb tsa tus nqi alpha (tseem 0–255), uas teev cov pob tshab (0 ua pob tshab thiab 255 yog "khoom")
Unimolecular Elimination (E1) yog cov tshuaj tiv thaiv uas qhov kev tshem tawm ntawm HX hloov pauv tau tsim los ntawm ob daim ntawv cog lus. Nws zoo ib yam li cov tshuaj tiv thaiv tsis muaj zog nucleophilic hloov pauv (SN1) hauv ntau txoj hauv kev. Ib qho yog qhov tsim ntawm carbocation nruab nrab
Gram zoo hlwb stain ntshav vim lawv cov peptotidoglycan txheej yog tuab txaus, txhais tau tias tag nrho cov kab mob Gram zoo yuav khaws lawv cov stain. Gram tsis zoo hlwb stain liab vim lawv muaj ib tug nyias peptidoglycan phab ntsa, thiab lawv yuav tsis khaws ib yam ntawm cov ntshav stain los ntawm crystal violet