Qhov sib npaug ntawm cov kaum sab nrauv ntawm quadrilaterals. Thaum ob sab ntawm lub quadrilaterals txuas ntxiv thiab cov ces kaum sab nrauv raug tsim. Qhov sib npaug ntawm plaub lub kaum sab nrauv yog ib txwm 360 degrees
S theem, los yog synthesis, yog theem ntawm lub voj voog ntawm tes thaum DNA ntim rau hauv chromosomes replicated. Qhov kev tshwm sim no yog ib qho tseem ceeb ntawm lub voj voog ntawm tes vim tias kev rov ua dua tso cai rau txhua lub cell tsim los ntawm kev faib cell kom muaj tib yam caj ces tsim
Lub ntsiab lus ntawm vector. Lub vector yog ib yam khoom uas muaj ob qho tib si loj thiab kev coj. Geometrically, peb tuaj yeem kos duab vector raws li kab lus qhia, nws qhov ntev yog qhov loj ntawm vector thiab nrog tus xub qhia txog kev coj ua. Ob qho piv txwv ntawm vectors yog cov uas sawv cev rau lub zog thiab nrawm
Thaum lub ticker timer txuas nrog AC fais fab mov, nws lub vibrating caj npab ntaus nws lub hauv paus 50 zaug txhua ob. Lub disc ntawm cov ntawv carbon ntawm daim ntawv daim kab xev thiab lub vibrating caj npab kom paub meej tias ib tug dub dot nyob rau hauv daim ntawv 50 zaug txhua ob; uas yog, ib tug dub dot yog ua txhua tsib caug ntawm ib tug thib ob
Tus Nqi Pib Pib yog pub dawb, tab sis rau $ 29 ib hlis cov neeg tsim khoom tuaj yeem ntxiv cov yam ntxwv zoo xws li Pob thiab xa tawm. Ntxiv nta xws li pab neeg sib koom tes thiab automation tuaj yeem nyob ntawm koj qhov pov tseg rau tag nrho $ 120 ib hlis
Lub tshuab hluav taws xob tshuab hluav taws xob Electron microscopes siv cov kab hluav taws xob ntawm cov hluav taws xob tsis yog cov kab hluav taws xob lossis cov hluav taws xob ntawm lub teeb. Cov hlwb tsis tuaj yeem soj ntsuam siv lub tshuab ntsuas hluav taws xob vim tias cov qauv muab tso rau hauv lub tshuab nqus tsev
Cov kab mob biotic nyob rau hauv ib qho ecosystem yog cov kab mob nyob, xws li tsiaj txhu. Cov yam ntxwv biotic nyob rau hauv ib qho ecosystem yog cov koom nrog hauv lub vev xaib khoom noj, thiab lawv vam khom ib leeg rau kev ciaj sia. Cov kab mob muaj sia no cuam tshuam ib leeg thiab cuam tshuam kev noj qab haus huv ntawm ecosystem
Violet lub teeb yog hluav taws xob hluav taws xob hluav taws xob nrog wavelengths ntawm 410 nanometers thiab lub teeb liab muaj awavelength ntawm 680 nanometers. Qhov ntau ntawm wavelengths (400 - 700 nm) ntawm lub teeb pom kev yog nyob nruab nrab ntawm lub electromagnetic spectrum (Fig.1)
DiGeorge syndrome cuam tshuam txog kwv yees li 1 ntawm 2500 tus menyuam yug los thoob ntiaj teb, thiab yog qhov thib ob feem ntau ntawm cov caj ces txawv txav, tom qab Down syndrome. Nws tuaj yeem kuaj pom nrog amniocentesis - ib txoj kev kho mob ua ntej yug menyuam siv los kuaj xyuas caj ces thiab chromosomal teeb meem
Lub kinetic txoj kev xav ntawm cov teeb meem (particle theory) hais tias txhua yam teeb meem muaj ntau yam, me me uas yog lossi txav los yog nyob rau hauv ib tug continual lub xeev ntawm kev txav. Qib uas cov khoom txav mus los yog txiav txim siab los ntawm tus nqi ntawm lub zog uas lawv muaj thiab lawv txoj kev sib raug zoo rau lwm cov khoom
Tab sis yog tias koj tab tom tham txog kev yuav lawv los ntawm lub khw muag paj, ces cov lus teb yuav zoo li yog, lilies yog kim dua. Ntau lub tsev cog khoom loj loj ua haujlwm uas loj hlob paj rau kev lag luam florist yuav loj hlob roses dua lilies. Florist lilies feem ntau yog Oriental lossis Asian lilies
Cov ntsiab lus tshawb fawb rau hahnium A hluavtaws, cov khoom siv hluav taws xob uas tsim los ntawm californium, americium, lossis berkelium. Nws cov isotopes nyob ntev tshaj plaws muaj cov lej ntawm 258, 261, 262, thiab 263 nrog ib nrab neej ntawm 4.2, 1.8. 34, thiab 30 seconds. Atomic naj npawb 105. Saib Lub Sijhawm Sijhawm
Hloov kev nyab xeeb ua rau hav zoov degradation. Raws li qhov kub thiab txias nce, ua rau hluav taws kub hav zoov. Tropical rainforests feem ntau tau tshaj 100 ntiv tes los nag hauv ib xyoos, tab sis txhua xyoo tus lej no txo qis - tsim cov txiaj ntsig ntawm qhov tshwm sim
Lub spliceosome catalyzes tshem tawm ntawm introns, thiab ligation ntawm flanking exons. Introns feem ntau muaj GU nucleotide ib ntus ntawm 5 'kawg splice site, thiab ib qho AG ntawm 3' kawg splice site. Ntau cov proteins nthuav tawm cov zinc-binding motif, uas qhia txog qhov tseem ceeb ntawm zinc hauv cov txheej txheem sib txuas
Lub zog, uas yog lub peev xwm los ua haujlwm lossis tsim cov cua sov, cuam tshuam rau tus nqi ntawm cov kuab tshuaj solute. Kev tawg, crushing los yog sib tsoo asugar lub voos xwmfab ua ntej muab tso rau hauv dej tsub kom cov suab thaj thaj chaw. Qhov no txhais tau hais tias qhov finer cov suab thaj, qhov ceev nws yuav yaj
Nws yog ib zaug ntseeg tias sodium tawg vim yog cov tshuaj alkali hlau tso tawm ntau cov pa roj hydrogen, nrog rau cov cua sov, ua rau cov pa taws kub hnyiab. Tl; DR: Sodium tawg vim nws poob nws cov valence electron nyob rau hauv dej, thiab thaum txaus atoms ua nws, lawv repel ib leeg ntawm high speeds
Cov kua dej uas tsis yog-Newtonian yog cov kua dej uas tsis ua raws li Newton txoj cai ntawm viscosity, piv txwv li, tas li viscosity tsis muaj kev ntxhov siab. Hauv cov kua dej uas tsis yog-Newtonian, viscosity tuaj yeem hloov pauv thaum nyob rau hauv quab yuam rau cov kua ntau dua lossis ntau dua. Ketchup, piv txwv li, ua runnier thaum shaken thiab yog li cov kua uas tsis yog-Newtonian
Haploid cells - Cov hlwb uas tsuas muaj ib pawg chromosomes xwb. Piv txwv: Cov phev hauv txiv neej thiab ov nyob rau hauv cov poj niam tsiaj. Diploid cells - Cov hlwb uas muaj ob pawg chromosomes. Piv txwv: Cells hauv lub cev tsis yog phev thiab ov. Triploid cells - Cov hlwb uas muaj peb pawg ntawm chromosomes
Puas yog qhov loj ntawm cov piam thaj hloov thaum nws yaj hauv cov kua? Nyob rau hauv tag nrho cov tshuaj, thiab feem ntau cov tshuaj tiv thaiv lub cev, kev txuag ntawm huab hwm coj yog pom. Thiab qhov no txhais tau tias. Thiab yog li yog tias peb yaj cov piam thaj ntau hauv cov dej, qhov loj ntawm cov tshuaj yuav yog PRECISELY
Kab graphs yog siv los taug qab cov kev hloov pauv hauv lub sijhawm luv thiab ntev. Thaum muaj kev hloov me me, cov kab ntawv zoo dua los siv dua li cov duab kos. Linegraphs kuj tuaj yeem siv los sib piv cov kev hloov pauv nyob rau tib lub sijhawm ntawm ntau tshaj ib pab pawg
liab Tsis tas li ntawd, xim dab tsi yog CoCl4 2? xiav Tsis tas li ntawd, puas yog kev tsim ntawm Tetrachlorocobalt II complex ib qho exothermic lossis endothermic txheej txheem? Cov tsim ntawm tetrachlorocobalt tshuaj ( II ) yog ib txheej txheem exothermic vim cua sov yog ib yam khoom nyob rau hauv no tshuaj tiv thaiv .
Kev Qhia Txog Kev Tshawb Fawb Txog Kev Tshawb Fawb Hauv Koj Cov Ntawv Txhais Lus: Ib txwm qhia qhov nruab nrab (tus nqi nruab nrab) nrog rau kev ntsuas ntawm qhov sib txawv (tus qauv sib txawv lossis tus qauv yuam kev ntawm qhov nruab nrab). Frequencies: Cov ntaub ntawv zaus yuav tsum tau muab sau tseg rau hauv cov ntawv nrog cov kev ntsuas tsim nyog xws li feem pua, proportions, los yog ratios
Jan Ingenhousz (Lub Kaum Ob Hlis 8, 1730 - Cuaj Hlis 7, 1799) yog 18th caug xyoo Dutch tus kws kho mob, kws kho tsiaj, thiab kws kho mob uas tshawb pom tias cov nroj tsuag hloov lub teeb rau hauv lub zog, cov txheej txheem hu ua photosynthesis. Nws kuj tau txais txiaj ntsig los ntawm kev tshawb pom tias cov nroj tsuag, zoo ib yam li cov tsiaj, tau txais cov txheej txheem ua pa ntawm tes
Ntxiv nrog rau kev ua haujlwm zoo li cov cuab yeej siv thev naus laus zis xws li cov cuab yeej ntsuas qhov deb, cov kws tshawb fawb hauv qab dej feem ntau yog lub luag haujlwm xws li: tuav, tshuaj xyuas, thiab sau cov dej hauv qab dej. Ua kev tshawb fawb siv cov cav nkoj thiab kev tshwm sim, cov neeg tshawb nrhiav cov nyiaj, thiab cov ntaub ntawv raug cai
Cov txheej txheem ntawm kev hloov cov duab ntawm cov protein kom lub luag haujlwm ploj yog hu ua denaturation. Proteins yooj yim denatured los ntawm tshav kub. Thaum cov protein molecules boiled lawv cov khoom hloov
Tropic. Suffix denoting ib tig mus rau, muaj affinity rau. Sib piv: -trophic
Zog coupling: Lub zog coupling tshwm sim thaum lub zog tsim los ntawm ib qho tshuaj tiv thaiv los yog siv los tsav lwm cov tshuaj tiv thaiv lossis lub cev. endergonic: Piav txog cov tshuaj tiv thaiv uas absorbs (kub) lub zog los ntawm nws ib puag ncig. exergonic: Piav txog cov tshuaj tiv thaiv uas tso tawm lub zog (kub) rau hauv nws ib puag ncig
Lub ntsej muag nruab nrab ntawm lub cubic thiab hexagonal kaw cov qauv ob qho tib si muaj qhov ntim ntawm 0.74, muaj cov dav hlau sib txuas ntawm cov atoms, thiab muaj kev sib koom ua ke ntawm 12. Qhov txawv ntawm fcc thiab hcp yog qhov sib txawv
Qhov loj heev San Andreas Fault faib lub roob hluav taws thiab Pacific Phaj nkag mus rau sab qaum teb, nqa lub Pinnacles. Kev ua haujlwm ntawm dej thiab cua ntawm cov pob zeb volcanic eroodible tau tsim cov pob zeb txawv txawv uas pom niaj hnub no. Kev ua txhaum cai thiab av qeeg kuj suav rau lub qhov tsua talus uas yog lwm qhov kev nyiam Pinnacles
Pov thawj rau Evolution: Sib piv embryology yog ib qho ntawm cov kab tseem ceeb ntawm cov pov thawj hauv kev txhawb nqa ntawm evolution. Hauv kev sib piv embryology, lub cev ntawm embryos los ntawm ntau hom sib piv los ntawm kev loj hlob ntawm embryos. Qhov zoo sib xws ntawm cov tsiaj sib txawv qhia tias peb txhua tus tuaj ntawm ib tug poj koob yawm txwv
13 tsab ntawv cov lus uas muaj morph metamorphosis. geomorphology. morphogenesis. homeomorphism. heteromorphic. monomorphemic. ginandromorph. actinomorphic
Yuav ua li cas taxonomists soj ntsuam evolutionary relationships ntawm cov kab mob? Taxonomists tshuaj xyuas cov yam ntxwv ntawm lub cev. Los ntawm kev sib piv cov qauv sib txawv thiab cov yam ntxwv, lawv muaj peev xwm tohypothesize txog kev sib raug zoo ntawm cov kab mob
Salt weathering yog ib hom kev siv tshuab lossis lub cev huab cua ntawm pob zeb. Tsis muaj tshuaj lom neeg hloov pauv ntawm cov pob zeb muaj feem cuam tshuam nrog ntsev huab cua. Cov ntsev muab tau los ntawm qhov chaw sab nraud (capillary nce hauv av, eolian keeb kwm, dej hiav txwv raws ntug dej hiav txwv, huab cua phem)
Nyob rau hauv classical txwv enzyme digestion thiab ligation cloning raws tu qauv, cloning ntawm tej DNA fragment yeej tseem ceeb muaj plaub kauj ruam: cais DNA ntawm kev txaus siab (los yog phiaj DNA), ligation, transfection (los yog transformation), thiab. ib txoj kev tshuaj ntsuam/xaiv
Feem ntau pom nyob rau hauv lub txias, arctic cheeb tsam, lub teeb ncej yog ib tug optical phenomenon uas txhua kab ntawm lub teeb yuav pom emanating los ntawm hauv qab los yog saum toj no lub teeb qhov chaw. Lub teeb ncej tshwm sim thaum lub teeb pom kev zoo los yog lub teeb pom kev zoo ntawm cov dej khov khov hauv cov huab cua ze rau lub ntiaj teb saum npoo
Hauv ib xyoos Photosynthesis tsim 160 billion tons ntawm carbohydrates
Kev tuav lub qhov tob ntawm 12 mus rau 18 ntiv tes yog qhov zoo tshaj plaws rau cov kav dej, tab sis qhov tob ntawm cov yeeb nkab yuav txawv nyob rau hauv thiaj li yuav tswj tau qhov nqes hav nqes hav, uas yog qhov tseem ceeb rau kev tso dej kom zoo
Acidic pob zeb yog pob zeb uas yog siliceous, muaj cov ntsiab lus siab ntawm silica (SiO2), lossis pob zeb nrog pH qis. Ob lub ntsiab lus tsis sib npaug, piv txwv li, nyob rau hauv cov ntaub ntawv ntawm basalt, uas tsis yog siab pH (pib), tab sis qis hauv SiO2
SOLUTION: Ib qho kev sib raug zoo yog ib qho kev ua haujlwm yog tias txhua lub ntsiab lus ntawm lub npe yog ua ke nrog ib qho ntawm qhov ntau. Yog tias muab ib daim duab, qhov no txhais tau hais tias nws yuav tsum xeem dhau txoj kab ntsug
Thaum tshav kub ntxiv rau ib yam khoom, cov molecules thiab atoms vibrate sai. Raws li atoms vibrate sai, qhov chaw nruab nrab ntawm atoms nce. Cov lus tsa suab thiab qhov sib nrug ntawm cov khoom txiav txim siab lub xeev ntawm cov khoom. Qhov kawg tshwm sim ntawm kev nce molecular zog yog tias cov khoom nthuav dav thiab siv ntau qhov chaw