Tropical grasslands, los yog savannas, kuj yog lub tsev ntawm primates nyob rau hauv teb chaws Africa thiab Asia; Tsis muaj savanna-nyob primates nyob rau hauv South America. Tropical grasslands muaj ib tug sib tov ntawm cov ntoo thiab nyom, qhov feem ntawm cov ntoo rau cov nyom sib txawv ncaj qha nrog los nag. Cov cheeb tsam ntawm lub caij nyoog siab
Duplication Duplication yog ib hom kev hloov pauv uas cuam tshuam nrog kev tsim ib lossis ntau daim ntawv theej ntawm cov noob lossis thaj tsam ntawm chromosome. Gene thiab chromosome duplications tshwm sim nyob rau hauv tag nrho cov kab mob, txawm hais tias lawv yog tshwj xeeb tshaj yog tseem ceeb ntawm cov nroj tsuag. Gene duplication yog ib qho tseem ceeb mechanism uas evolution tshwm sim
Yooj Yim Stain Txheej Txheem: Ntxuav thiab qhuav lub tshuab tsom iav kom huv si. Nplaim qhov chaw uas cov smear yuav kis tau. Nplaim lub voj inoculating. Hloov ib lub voj puv ntawm cov kais dej mus rau qhov chaw nplaim taws. Reflame lub voj kom paub tseeb tias tag nrho qhov ntev ntawm cov hlau uas yuav nkag mus rau hauv lub raj tau raug rhuab mus rau liab
Qhov no deforestation yog qhov tseem ceeb tshaj plaws ntawm kev siv av hloov cuam tshuam rau lub ntiaj teb ua kom sov. Cov laj thawj tseem ceeb yog: kev rhuav tshem los ntawm kev siv av tas mus li hloov rau cov khoom ua liaj ua teb xws li nqaij nyug thiab xibtes roj (27%), hav zoov / cov khoom siv hav zoov (26%), kev cog qoob loo luv luv (24%), thiab hluav taws kub (23%)
Cloning, tus txheej txheem ntawm kev tsim cov noob caj noob ces zoo tib yam ntawm ib lub xovtooj ntawm tes los yog lub cev. Cloning tshwm sim feem ntau nyob rau hauv qhov-piv txwv li, thaum lub xov tooj ntawm tes replicates nws tus kheej asexually yam tsis muaj genetic hloov los yog recombination
Kev tsim cov ammonium nitrate yog qhov yooj yim: ammonia gas reacted nrog nitric acid los tsim ib qho kev daws teeb meem thiab kub heev. Prilled fertilizer cov ntaub ntawv thaum ib tug poob ntawm concentrated ammonium nitrate tov (95 feem pua rau 99 feem pua) ntog los ntawm ib tug pej thuam thiab solidifies
Generalized Hooke's Law. Txoj Cai Hooke Generalized tuaj yeem siv los kwv yees qhov deformations tshwm sim hauv cov khoom siv los ntawm kev sib xyaw ua ke ntawm kev ntxhov siab. Txoj kev sib raug zoo ntawm kev ntxhov siab thiab kev nyuaj siab siv rau
Cov ntsiab lus hauv cov txheej no (10) Cov qauv yooj yim tshaj plaws rau covalent compound yog nws. Lub anion tsim los ntawm cov pa atom yog hu ua an. Fe O yog hu ua hlau (III) oxide vim nws muaj. Nws yog ua tau rau cov sib txawv covalent tebchaw kom muaj tib empirical mis vim hais tias cov qauv empirical sawv cev
Hauv 2015, thawj zaug, ntau dua 2 lab tus tib neeg tau mus xyuas Joshua Tree National Park hauv California. Cov neeg tuaj saib tsis tau ua si los ntawm txoj cai, txiav txoj kev tsis raug cai, tsoo lub tiaj ua si cov neeg nto moo tshaj plaws - cov ntoo Yausua - thiab ua rau tsoomfwv cov khoom puas tsuaj, raws li National Parks Traveler
Obelia lub neej voj voog pib raws li lub cev tsis muaj zog polyp cov cheeb tsam uas muaj cov plab hnyuv hydranth thiab cov qe menyuam gonangium units. Lub gonangium reproduce asexually, tso medusa los ntawm budding. Cov medusa, los yog jellyfish, ua luam dej dawb thiab yug me nyuam, tso qe thiab phev mus rau hauv dej
Tau kawg, muaj qhov "dub" teeb. Qhov no yog tam sim no tsuas yog xa mus rau lub teeb uas tsis yog ib feem ntawm qhov pom spectrum. Nws yog hu ua lub teeb dub, thiab yog lub teeb ultraviolet
Isomers yog cov tebchaw nrog tib cov qauv molecular tab sis txawv cov qauv tshuaj thiab kev ua haujlwm. Tej zaum koj yuav tau kawm tias muaj peb hom isomers - qauv thiab geometric isomers thiab enantiomers - thaum tiag tiag tsuas muaj ob hom (cov qauv thiab stereoisomer) thiab ob peb subtypes
2D duab A 2D duab yog ib lub tiaj tiaj. Lub ntsej muag yog ib feem ntawm cov duab uas muaj thaj tsam loj tshaj plaws - qee qhov tuaj yeem tiaj tus, qee qhov tuaj yeem nkhaus xws li. ib lub voos xwmfab muaj 6 lub ntsej muag tiaj tus thaum lub tog raj kheej muaj 2 lub ntsej muag tiaj tus thiab 1 lub ntsej muag nkhaus
Muaj ntau lab tus paub cov organic tebchaw, uas yog ntau tshaj li cov inorganic tebchaw. Yog vim li cas nyob rau hauv lub uniqueness ntawm carbon cov qauv thiab kev sib raug zoo muaj peev xwm. Cov pa roj carbon muaj plaub valence electrons thiab yog li ntawd ua rau plaub cais covalent bonds hauv cov tebchaw
Cov Lus Teb luv luv: Cov ntiaj chaw uas nyob ib puag ncig lwm lub hnub qub hu ua exoplanets. Tag nrho cov ntiaj chaw nyob rau hauv peb lub hnub ci system orbit ncig lub hnub. Cov ntiaj chaw uas nyob ib ncig ntawm lwm lub hnub qub yog hu ua exoplanets. Exoplanets yog qhov nyuaj heev kom pom ncaj qha nrog telescopes
Qhov sib txawv tseem ceeb ntawm enzymatic thiab nonenzymatic browning yog tias enzymatic browning koom nrog enzymes xws li polyphenol oxidase thiab catechol oxidase whereas lub nonenzymatic browning tsis koom nrog tej yam enzymatic
Vim lub ntiaj teb curvature, qhov deb ntawm lub voj voog yog los ntawm Equator, qhov me dua. Ntawm North thiab South Ncej, arcdegrees tsuas yog cov ntsiab lus. Degree ntawm latitude muab faib ua 60 feeb. Txhawm rau kom meej meej, cov feeb no tau muab faib ua 60 vib nas this
Yog tias qhov sib txawv (cia hais tias X) yog qhov tsis zoo, ces X hauv lub sijhawm siab tshaj plaws tsim qhov tsis zoo. Peb mam li muab cov coefficient ntawm lub sij hawm txhuas nrog qhov tsis zoo los txiav txim qhov kawg tus cwj pwm
Thaum ntau cov molecules ntawm ib qho yooj yim compound koom ua ke, cov khoom yog hu ua ib tug polymer thiab cov txheej txheem polymerization. Cov tebchaw yooj yim uas nws cov molecules koom ua ke los tsim cov polymers hu ua monomers. Lub polymer yog cov saw hlau ntawm cov atoms, muab cov pob txha, uas cov atoms lossis pawg ntawm cov atoms koom nrog
Cov ntoo uas ib txwm ua rau cov tawv ntoo hauv cov chunks loj thiab cov nplooj tev muaj xws li: Silver maple. Birch. Sycamore. Redbud. Shagbark hickory. Scotch ntoo
Thaum 10:56 p.m. EDT, tus kws tshawb fawb Asmeskas, Neil Armstrong, 240,000 mais ntawm lub ntiaj teb, hais cov lus no rau ntau tshaj li ib txhiab tus neeg mloog hauv tsev: "Nws yog ib kauj ruam me me rau txiv neej, ib qho kev dhia loj heev rau noob neej." Stepping tawm lub lunar tsaws module Eagle, Armstrong tau los ua thawj tus tib neeg taug kev ntawm qhov chaw
Sundaland. Sundaland yog ib cheeb tsam hauv South-East Asia uas npog thaj tsam sab hnub poob ntawm Indo-Malayan archipelago. Nws suav nrog Thaib, Malaysia, Singapore, Brunei thiab Indonesia. Is Nrias teb yog sawv cev los ntawm Nicobar Islands
Nyob rau xyoo 1950, Linus Pauling tau los ua lub npe hu ua tus tsim ntawm molecular biology vim nws nrhiav pom ntawm cov qauv ntawm cov proteins (Taton, 1964). Pauling qhov kev tshawb pom tau pab txhawb rau Watson thiab Crick qhov kev tawg ntawm DNA ob chav helix
Mendeleev tshuav qhov khoob hauv nws lub rooj rau qhov chaw tsis paub thaum lub sijhawm. Los ntawm saib cov khoom siv tshuaj thiab lub cev lub cev ntawm cov khoom nyob ib sab ntawm agap, nws kuj tuaj yeem kwv yees cov khoom ntawm cov ntsiab lus tsis tau tshawb pom. Lub caij germanium tau tshawb pom tom qab
Alpha hluav taws xob yog absorbed los ntawm lub thickness ntawm daim tawv nqaij los yog los ntawm ob peb centimeters ntawm huab cua. Beta radiation yog nkag mus ntau dua li alpha hluav taws xob. Nws tuaj yeem hla ntawm daim tawv nqaij, tab sis nws yog absorbed los ntawm ob peb centimeters ntawm lub cev nqaij daim tawv los yog ob peb millimeters ntawm txhuas
Tab sis xyoo 1970 yav tom ntej Apollo missions raug muab tso tseg. Apollo 17 tau dhau los ua lub luag haujlwm kawg rau lub hli, rau lub sijhawm tsis kawg. Lub ntsiab yog vim li cas rau qhov no yog nyiaj. Tus nqi ntawm kev mus rau lub hli yog, ironically, astronomical
Thaum lub sij hawm kev loj hlob, feem ntau muaj sia nyob mus txog ib lub voj voog ntawm kev hloov hu ua kev loj hlob. Cov khoom muaj sia tau txais lub zog los ntawm lawv ib puag ncig thiab siv lub zog ntawd los loj hlob, tsim kho, thiab tsim tawm. Txhua yam kab mob xav tau lub zog los tsim cov tshuaj uas ua rau lawv lub hlwb
Kev thauj mus los nruab nrab yog hais txog kev thauj mus los los ntawm kev thauj mus los ntawm cov protein. Nws yog ib qho uniport system vim hais tias nws tshwj xeeb thauj cov piam thaj hauv ib qho kev taw qhia, nqes nws cov concentration gradient hla lub cell membrane
Cov khoom ua si zoo tshaj & Khoom plig rau 8 Xyoo Cov Tub. 1 Nerf Official N-Strike Elite Strongarm Blaster. 2 Osmo Genius Cov Khoom Siv rau iPad. 3 Spike 3 Ball Kit. 4 ThinkFun Gravity Maze Game. 5 National Geographic 35-in1 Mega Siv Khoom Siv. 6 4M Hnub Ci System Planetarium. 7 Lego Boost Fun Robot Tsev Teeb
Geographical Distribution. Kev nyab xeeb monsoon muaj nyob rau ntawm ntug dej hiav txwv ntawm sab hnub poob Is Nrias teb, Sri Lanka, Bangladesh, Myanmar, Southwestern Africa, Fabkis Guiana, thiab sab qaum teb thiab sab qab teb Brazil
Lub Hnub Tuag Tuag yog qhov chaw nres tsheb loj heev nrog lub ntiaj teb ua kom puas tsuaj superlaser
Raws li ib zaj dab neeg, Pershing tau hu ua 'Black Jack' vim nws tau txib cov tub rog dub thaum Asmeskas-Indian Wars ntawm lub xyoo pua 19th. Nws tseem raug liam tias nws tau txais lub npe menyuam yaus vim qhov hnyav, tsis zam txim rau kev qhuab ntuas nws tau siv sijhawm nws ua tus kws qhia West Point
Ib lub ntsiab lus yog sau npe siv tsab ntawv loj. Ib kab tuaj yeem sau npe siv ob lub ntsiab lus ntawm kab. Lub dav hlau tuaj yeem sau npe siv peb lub ntsiab lus ntawm lub dav hlau. Ob lossis ntau lub ntsiab lus tau hais tias yog collinear yog tias cov ntsiab lus nyob ntawm tib kab
Muab lub npe IUPAC rau qhov sib xyaw hauv qab no: Qhia txog pawg ua haujlwm. Nrhiav qhov ntev tshaj plaws carbon saw muaj cov functionalgroup. Sau cov carbons nyob rau hauv cov saw ntev tshaj plaws. Saib rau ib pawg twg, npe rau lawv thiab muab tus lej ntawm cov pa roj carbon atom uas cov pab pawg sib txuas
Trifluoroacetic acid (TFA) yog ib qho organofluorine compound nrog cov tshuaj formula CF3CO2H. Nws yog ib qho qauv analogue ntawm acetic acid nrog tag nrho peb ntawm pawg acetyl hydrogen atoms hloov los ntawm fluorine atoms thiab yog cov kua tsis muaj xim nrog cov kua qaub xws li tsw
Lub Centralizer ntawm Matrix yog Subspace Cia V yog qhov chaw vector ntawm n × n matrices, thiab M∈V ib lub matrix ruaj khov. Txhais W={A∈V∣AM=MA}. Lub teeb W ntawm no yog hu ua centralizer ntawm M hauv V. Ua pov thawj tias W yog ib qho subspace ntawm V
Muaj ib lub npe luv ntawm quart: qt
Nws yooj yim npaum li qhov ntawd, thiab nws ua haujlwm. Infrared teeb (tseem hu ua "IR teeb) yog loj, 250-watt, reddish incandescent qij. Feem ntau ntawm lawv emit tsis tsuas yog infrared nthwv dej (tsawg-theem laser), tab sis liab, txiv kab ntxwv thiab daj lub teeb ib yam nkaus thiab
Ecologists yog cov kws tshawb fawb uas kawm txog ecosystems, los ntawm lub ntiaj teb ntawm cov kab mob microscopic mus rau lub neej loj hauv dej hiav txwv. Lawv kawm txog kev sib txuas thiab kev sib raug zoo ntawm ntau yam muaj sia thiab lawv ib puag ncig, ob qho tib si tshwm sim spheres thiab thaj chaw uas muaj cov khoom tsim los ntawm tib neeg
Cov txheej txheem ntawm tag nrho cov txiaj ntsig tau raug hu ua qhov chaw piv txwv ntawm qhov kev sim thiab feem ntau yog qhia los ntawm S. Ib qho subset E ntawm qhov chaw qauv S yog hu ua ib qho kev tshwm sim. Nov yog qee qhov piv txwv. Piv txwv 1 Tossing ib npib