5,000 xyoo. Kawg hloov kho: 2023-12-15 23:12
Cov cheeb tsam subarctic feem ntau tshwm sim los ntawm cov nroj tsuag taiga hav zoov, txawm hais tias qhov twg lub caij ntuj no kuj me me, xws li nyob rau sab qaum teb Norway, broadleaf hav zoov yuav tshwm sim-txawm hais tias qee zaum cov av tseem saturated yuav luag txhua xyoo los txhawb nqa txhua tsob ntoo loj hlob thiab cov nroj tsuag tseem ceeb yog ib qho kev loj hlob zoo. peaty nroj tsuag. Kawg hloov kho: 2023-12-15 23:12
Cov kev sib txuas no ua rau 10 lub ntsiab lus ntawm biology. Cov khoom muaj xwm ceev. Lub neej muaj nyob rau hauv daim ntawv hierarchical, los ntawm ib leeg-celled kab mob mus rau tag nrho biosphere, nrog rau tag nrho nws cov ecosystems. Lub Cell. Cov ntaub ntawv keeb kwm yav dhau los. Structure thiab Function. Environmental Interactions. Tawm tswv yim thiab kev cai. Unity thiab Diversity. Evolution. Kawg hloov kho: 2024-01-18 08:01
Teb thiab piav qhia: Qhov kev txiav txim ntawm helicase tsim ib lub voj voog rov ua dua. Helicase yog lub luag hauj lwm rau 'unzipping' ob-helix DNA strand, thiab ib tug replication diav rawg yog lub. Kawg hloov kho: 2023-12-15 23:12
Lub cev lub cev lub ntsiab lus kev xav (PSSH) yog ib txoj hauj lwm hauv lub tswv yim ntawm kev txawj ntse tsim los ntawm Allen Newell thiab Herbert A. 'Ib lub cim lub cev muaj qhov tsim nyog thiab txaus txhais tau tias rau kev ua haujlwm ntse.'. Kawg hloov kho: 2023-12-15 23:12
Electrolytes. Kawg hloov kho: 2023-12-15 23:12
Thaum lub hnub ci teeb tsa nyob rau hauv nws qhov kev teeb tsa tam sim no txog 4.5 billion xyoo dhau los, lub ntiaj teb tsim thaum lub ntiajteb txawj nqus rub cov pa roj thiab hmoov av los ua lub ntiaj teb thib peb ntawm lub hnub. Zoo li nws cov ntiaj chaw hauv ntiaj teb, lub ntiaj teb muaj lub hauv paus tseem ceeb, lub tsho pob zeb thiab cov tawv tawv tawv. Kawg hloov kho: 2023-12-15 23:12
Txhawm rau nrhiav thaj tsam ntawm lub voj voog nrog lub vojvoog, square lub vojvoog, lossis muab nws los ntawm nws tus kheej. Tom qab ntawd, muab cov squared vojvoog los ntawm pi, lossis 3.14, kom tau qhov chaw. Txhawm rau nrhiav thaj chaw nrog txoj kab uas hla, tsuas yog faib txoj kab uas hla los ntawm 2, ntsaws rau hauv lub vojvoog mis, thiab daws raws li ua ntej. Kawg hloov kho: 2023-12-15 23:12
Mercury yog xim dawb-dawb, ci iab hlau, uas yog kua nyob rau hauv chav tsev kub. Vim nws qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom, mercury muaj peev xwm ua rau cov hlau ntub dej. Lub cev muaj zog. Kub (°C) Siab (Pa) Mercury cov ntsiab lus hauv huab cua (mg/m3) 20 0.170 14.06 30 0.391 31.44 100 36.841 2,404.00. Kawg hloov kho: 2023-12-15 23:12
Qhov seem theorem hais tias f(a) yog qhov seem thaum lub polynomial f(x) muab faib los ntawm x - a. Yog li, muab ib tug polynomial, f (x), saib yog hais tias ib tug linear binomial ntawm daim ntawv x - a yog ib feem ntawm lub polynomial, peb daws rau f (a). Yog tias f(a) = 0, ces x - a yog qhov tseem ceeb, thiab x - a tsis yog lwm yam. Kawg hloov kho: 2023-12-15 23:12
< General Astronomy. Cov nyhuv Doppler lossis Doppler hloov pauv piav qhia txog qhov tshwm sim uas lub wavelength ntawm lub zog hluav taws xob los ntawm lub cev mus rau tus neeg soj ntsuam tau hloov mus rau qhov luv wavelengths, whereas lub wavelengths hloov mus rau qhov tseem ceeb ntev dua thaum cov khoom emitting rov qab los ntawm tus neeg soj ntsuam. Kawg hloov kho: 2023-12-15 23:12
Cov khub ntawm chromosomes hauv ib tus neeg diploid uas muaj tib lub ntsiab lus ntawm caj ces. Ib tug tswv cuab ntawm txhua homologous khub ntawm chromosomes nyob rau hauv tau txais los ntawm txhua tus niam txiv. Ob leeg alleles rau ib tug zoo yog tib yam nyob rau hauv ib tug neeg. Lawv tuaj yeem ua homozygous dominant (YY), lossis homozygous recessive (yy). Kawg hloov kho: 2023-12-15 23:12
Yuav ua li cas muaj pes tsawg Newtons ntiaj teb ntawm qhov hnyav thiab huab hwm coj system nyob rau hauv 1 tonne metric? Cov lus teb yog: Qhov kev hloov ntawm 1 t (tonne metric) chav tsev rau qhov hnyav thiab qhov hnyav ntsuas sib npaug = rau 9,806.65 N (newton ntiaj teb) raws li nws qhov sib npaug thiab qhov hnyav ntawm chav tsev ntsuas feem ntau siv. Kawg hloov kho: 2023-12-15 23:12
Cov kab mob DNA ib leeg siv tib lub tshuab luam ntawv thiab rov ua dua tshiab. Los ntawm ssDNA, (+) ssRNA yog tsim los ntawm tus tswv cell RNA polymerase, thiab siv rau hauv kev sau ntawv. Host cell DNA polymerase yog siv nyob rau hauv replication. Reverse transcriptase yog ib qho enzyme uas replicates DNA los ntawm RNA. Kawg hloov kho: 2023-12-15 23:12
Lub xovtooj ntawm tes qhuav siv cov tshuaj txhuam electrolyte, tsuas yog muaj cov dej noo txaus kom tso cai rau cov dej ntws tam sim no. Niaj hnub no cov tsheb feem ntau tuaj nruab nrog cov roj teeb ntawm tes qhuav vim lawv suav tias yog ib puag ncig tus phooj ywg. Txij li thaum tsis muaj kua qaub tawm los ntawm lawv, thiab tsis tas li ntawd tsis muaj kev hem thawj ntawm cov kua qaub los yog kua qaub (kua). Kawg hloov kho: 2023-12-15 23:12
Piav plaub hom pov thawj ntawm cov tshuaj tiv thaiv tshuaj. Kev hloov xim, tsim los ntawm precipitate lossis roj, lossis qhov kub thiab txias yog cov pov thawj ntawm cov tshuaj tiv thaiv. Kawg hloov kho: 2023-12-15 23:12
Lub Slow Formation ntawm ib tug Arch Hauv qab Arches National Park yog ib lub txaj ntsev, uas tau muab tso rau qee qhov 300 lab xyoo dhau los thaum thaj chaw yog ib feem ntawm dej hiav txwv. Thaum lub hiav txwv evaporated, nws tshuav ntsev deposits; qee thaj chaw tau sau ntau tshaj ib txhiab ko taw ntawm cov deposits. Kawg hloov kho: 2023-12-15 23:12
Tsiaj Cell zoo li Zoo. Nucleus zoo li cov neeg zov tsiaj vim tias lawv khaws cov tsiaj txhu thiab cov tsiaj txhu zoo li hauv lub cell lub nucleus tswj ntau lub luag haujlwm hauv cell. Kawg hloov kho: 2023-12-15 23:12
Cell organelles uas koom rau hauv cov protein synthesis yog golgi lub cev, ribosomes thiab endoplasmic reticulum. Ribosomes synthesis proteins uas tau ntim los ntawm golgi lub cev thiab kis los ntawm endoplasmic reticulum. Lub ribosome yog ib tug complex molecule ua los ntawm ribosomal RNA molecules thiab lub luag hauj lwm rau protein synthesis. Kawg hloov kho: 2023-12-15 23:12
Microbiologists, Av thiab cog kws tshawb fawb, thiab Ecologists tuaj yeem ua haujlwm hauv kev kho mob, rau cov tuam txhab huv huv, hauv kev tsim khoom, hauv tsev kawm ntawv, rau ntau lub tuam txhab ntiag tug, cov tuam txhab kev cai lij choj, cov pab pawg tsis muaj txiaj ntsig, lossis tsoomfwv cov koom haum xws li Lub Chaw Tiv Thaiv Ib puag ncig. , National Park Service, los yog. Kawg hloov kho: 2023-12-15 23:12
Xenocrypt (tsis muaj ntau tshaj ib qho) Kev Ua lej Cryptanalysis ntawm Hill Cipher - yog tsim cov decryption matrix muab 2x2 encryption matrix lossis suav cov decryption matrix muab 4 daim ntawv dawb-ciphertext ntawv ua khub. Kawg hloov kho: 2023-12-15 23:12
Cov kws tshawb fawb tau siv lub zog lasers kom sov cov khoom siv los ua ib feem ntawm kev siv zog los tsim fusion zog rau ntau xyoo. Thaum lasers siv los ua kom sov cov ntaub ntawv feem ntau, lub zog ntawm lub laser ua ntej heats li electrons nyob rau hauv lub hom phiaj. Kawg hloov kho: 2023-12-15 23:12
Nyob rau hauv lub hwj chim ntawm kaum lub cim, cov lej loj yog sau siv kaum rau lub hwj chim, lossis tus exponent. Tus exponent qhia koj pes tsawg zaus kaum yog muab los ntawm nws tus kheej kom sib npaug ntawm tus lej koj xav sau. Piv txwv li, 100 tuaj yeem sau ua 10x10 = 102. 10,000 = 10x10x10x10 = 104. Kawg hloov kho: 2023-12-15 23:12
Qhov tseem ceeb ntawm txhua tsob ntoo muaj nyob rau hauv cov hauv paus hauv paus, lub cev, ceg, thiab nplooj. Cov no yog tej yam uas maketrees ntoo. Kawg hloov kho: 2023-12-15 23:12
Qhov tseeb. Peb lub hnub ci muaj peb lub hnub qub, Lub Hnub, thiab txhua yam uas khi rau nws los ntawm lub ntiajteb txawj nqus - Mercury, Venus, Ntiaj Teb, Mars, Jupiter, Saturn, Uranus thiab Neptune, dwarf ntiaj chaw xws li Pluto, ntau lub hli thiab ntau lab lub hnub qub. , comets thiab meteoroids. Kawg hloov kho: 2023-12-15 23:12
SI units ntawm qhov hnyav yog kg / m3, tab sis muaj ob peb lwm units. Ib qho ntawm feem ntau siv units ntawm qhov hnyav yog gram ib cubic centimeter, los yog g / cc. Qhov no yog vim cov dej ntshiab muaj qhov ntom ntom ntawm 1 g / cc. Nws hloov tawm tias 1 mL ntawm cov kua yog sib npaug rau 1 cc ntawm ntim. Kawg hloov kho: 2023-12-15 23:12
Mitochondria yog ib feem ntawm eukaryotic hlwb. Lub luag haujlwm tseem ceeb ntawm mitochondria yog ua pa ntawm tes. Qhov no txhais tau tias nws yuav siv cov as-ham los ntawm lub cell, lov nws, thiab hloov mus rau hauv lub zog. Lub zog no yog tom qab siv los ntawm lub xovtooj los ua haujlwm ntau yam. Kawg hloov kho: 2023-12-15 23:12
Cov dej hiav txwv ncig txoj siv conveyor pab sib npaug kev nyab xeeb. Raws li ib feem ntawm txoj siv dej hiav txwv conveyor, cov dej sov los ntawm qhov chaw sov sov Atlantic txav mus rau hauv qhov chaw ze ntawm qhov chaw uas nws tso qee qhov cua sov rau cov cua. Cov txheej txheem no ua rau qee qhov ntsuas qhov txias txias ntawm qhov siab dua latitudes. Kawg hloov kho: 2023-12-15 23:12
Chemiluminescence (CL) txhais tau tias yog emission ntawm electromagnetic tawg tshwm sim los ntawm cov tshuaj tiv thaiv los tsim lub teeb. Chemiluminescence immunoassay (CLIA) yog ib qho kev ntsuam xyuas uas muab cov txheej txheem chemiluminescence nrog cov tshuaj tiv thaiv kab mob. Kawg hloov kho: 2023-12-15 23:12
Department' yog hais txog cov chav me me ntawm afaculty uas cuam tshuam nrog thaj chaw tshwj xeeb ntawm kev ua haujlwm.'faculty' tuaj yeem xa mus rau ib pawg ntawm cov tsev kawm ntawv qib siab uas cuam tshuam nrog kev faib loj ntawm kev paub lossis cov tswv cuab ntawm cov neeg ua haujlwm hauv cov haujlwm no.'. Kawg hloov kho: 2023-12-15 23:12
Lub prefix yog ib lub ntsiab lus nyob rau ntawm qhov pib ntawm ib lo lus. Cov ntawv sau ua ntej feem ntau qhia tus lej, sijhawm, txoj haujlwm, kev taw qhia, lossis kev nkag siab ntawm kev tsis pom zoo. Kawg hloov kho: 2023-12-15 23:12
Piv txwv ntawm cov pov thawj hauv chav kawm muaj xws li hom ntshav, fibers, thiab xim. Cov yam ntxwv ntawm tus kheej yog cov khoom pov thawj ntawm lub cev uas tuaj yeem raug ntaus nqi rau ib qho chaw uas muaj kev ntseeg siab. Piv txwv ntawm tus kheej cov pov thawj suav nrog txhua yam uas muaj cov DNA DNA, cov cim, thiab cov ntiv tes. Kawg hloov kho: 2023-12-15 23:12
Sedimentary pob zeb ua metamorphic nyob rau hauv lub pob zeb voj voog thaum lawv raug tshav kub thiab siab los ntawm faus. Cov kub kub yog tsim thaum lub ntiaj teb daim hlau tectonic txav ib ncig, ua kom sov. Thiab thaum lawv sib tsoo, lawv tsim roob thiab metamorphose. Kawg hloov kho: 2023-12-15 23:12
Cov rhawv ib txwm muaj nyob hauv South Tuam Tshoj Hiav Txwv, North Hiav Txwv, thiab Persian Gulf thiab feem ntau yog li 80 km dav nrog qhov tob ntawm 30-600 m. Kawg hloov kho: 2023-12-15 23:12
Muaj txog 300 lub roob hluav taws hauv Philippines. Nees nkaum-ob (22) ntawm cov no tau ua haujlwm thaum qhov feem pua loj loj tseem nyob twj ywm raws li cov ntaub ntawv. Feem ntau ntawm cov volcanoes nquag nyob hauv cov kob ntawm Luzon. Lub rau lub roob hluav taws kub tshaj plaws yog Mayon, Hibok-Hibok, Pinatubo, Taal, Kanlaon thiab Bulusan. Kawg hloov kho: 2023-12-15 23:12
DIY Force soj ntsuam. Lub tswv yim yooj yim yog siv cov roj hmab band los ntsuas lub zog (los ntawm kev ntsuas tus nqi ntawm cov roj hmab band stretches). Ob daim ntawv clips ua ob yam. Ua ntej, nws tso cai rau koj mus txuas rau lub cuab yeej rau ib yam dab tsi (xws li dai ib co Lego cib ntawm nws) thiab nws muab cov straws ib qho chaw txuas. Kawg hloov kho: 2023-12-15 23:12
400x loj Raws li kev sib raug zoo, koj xav tau qhov loj npaum li cas kom pom cov hlwb? 400x ib Tom qab ntawd, lo lus nug yog, koj puas tuaj yeem pom paramecium yam tsis muaj lub tshuab tsom? Qee lub hlwb pom ntawm qhov muag tsis pom Qhov ntawd txhais tau hais tias nyob rau hauv cov xwm txheej zoo, koj tej zaum yuav ua tau saib aameoba proteus, tib neeg qe, thiab a Paramecium tsis muaj siv magnification.. Kawg hloov kho: 2023-12-15 23:12
Samarium yog qhov thib tsib tshaj plaws ntawm cov ntsiab lus tsis tshua muaj thiab yuav luag plaub zaug ntau dua li cov tin. Nws yeej tsis pom muaj dawb hauv cov xwm txheej, tab sis muaj nyob hauv ntau cov zaub mov, suav nrog monazite, bastnasite thiab samarskite. Kawg hloov kho: 2023-12-15 23:12
Nyob ntawm seb muaj pes tsawg tus chiasmata koom nrog, hla tuaj yeem yog peb hom, viz., ib leeg, ob npaug thiab ntau yam raws li tau piav qhia hauv qab no: i. Tib Hla Hla: Nws hais txog kev tsim ntawm ib qho chiasma ntawm cov tsis yog tus muam chromatids ntawm homologous chromosomes. Kawg hloov kho: 2023-12-15 23:12
Lub Great Debate ntawm 1920 Shapley coj sab uas kauv nebulae (dab tsi yog tam sim no hu ua galaxies) nyob rau hauv peb Milky Way, thaum Curtis coj sab hais tias lub kauv nebulae yog 'kob ntug hiav txwv dej' deb sab nraum peb tus Milky Way thiab sib piv nyob rau hauv loj thiab xwm rau peb tus kheej Milky Way. Kawg hloov kho: 2023-12-15 23:12