Kev kawm 2024, Kaum ib hlis

Dab tsi yog kev sib raug zoo ntawm biotechnology thiab genetic engineering?

Dab tsi yog kev sib raug zoo ntawm biotechnology thiab genetic engineering?

Biotechnology yog ib qho kev tshawb fawb txog kev tshawb fawb uas ua ke nrog biology thiab thev naus laus zis. Genetic engineering yog kev tswj cov khoom siv caj ces (DNA) ntawm cov kab mob muaj sia nyob ntawm txoj kev tsim khoom

Vim li cas tus number case cais?

Vim li cas tus number case cais?

Raws li cov dej nkag mus rau hauv daim ntawv, cov xim yuav cais tawm mus rau hauv lawv cov khoom. Capillary kev txiav txim ua rau cov kuab tshuaj mus rau hauv daim ntawv, qhov twg nws ntsib thiab yaj tus number case. Cov kua nplaum yaj (theem mobile) maj mam txav mus rau hauv daim ntawv (theem nyob ruaj ruaj) thiab cais tawm mus rau hauv cov khoom sib txawv

Vim li cas cov neeg caij tsheb yuav tsum tau pab los ntawm cov cab kuj molecule?

Vim li cas cov neeg caij tsheb yuav tsum tau pab los ntawm cov cab kuj molecule?

Vim li cas cov neeg caij tsheb yuav tsum tau pab los ntawm cov cab kuj molecule? Cov neeg caij tsheb molecules xav tau kev pab vim lawv tsis tuaj yeem haum los ntawm cov cell membrane. Yooj yim diffusion nrog kev pab los ntawm cov cab kuj molecule tsis xav tau lub zog, nws mus los ntawm ntau dua concentration mus rau qis concentration

Yuav ua li cas koj faib ib ntu rau hauv ib qho piv txwv?

Yuav ua li cas koj faib ib ntu rau hauv ib qho piv txwv?

Partitioning a line segment, AB, into a ratio a/b involving the line segment into a + b equal parts and find a point that is a sib npaug qhov chaw ntawm A thiab b qhov sib npaug ntawm B. Thaum nrhiav ib qho point, P, mus rau muab faib ib kab ntu, AB, rau hauv qhov ratio a/b, peb xub pom ib tug ratio c = a / (a + b)

Yuav ua li cas cov protein txiav txim qhov zoo?

Yuav ua li cas cov protein txiav txim qhov zoo?

Ib hom lus nruab nrab, encoded nyob rau hauv ib theem zuj zus ntawm Ribonucleic Acid (RNA), txhais cov noob lus rau hauv cov protein cov amino acid ib ntus. Nws yog cov protein uas txiav txim siab qhov zoo. Lus Cim: Cov noob yog cov kab ke DNA qhia cov hlwb los tsim cov proteins tshwj xeeb, uas ua rau txiav txim siab qhov zoo

Cov hnub qub twg tau tawm ntawm qhov tseem ceeb?

Cov hnub qub twg tau tawm ntawm qhov tseem ceeb?

Qhov Kawg ntawm Cov Ntsiab Lus Tseem Ceeb Cov hnub qub loj, txias nyob rau sab xis ntawm daim duab H-R yog cov hnub qub uas nyuam qhuav tawm ntawm qhov tseem ceeb. Nyob rau hauv lub hnub qub nruab nrab, zoo li peb lub hnub, lub siab los ntawm lub ntiajteb txawj nqus thawb sab hauv ua rau latent hydrogen nyob rau hauv lub plhaub txheej txheej ntawm lub hnub qub kom fuse rau hauv helium

Lub ntsiab ntawm kuv yuav muab rau koj yog dab tsi?

Lub ntsiab ntawm kuv yuav muab rau koj yog dab tsi?

Lub ntsiab lus tseem ceeb tau ntsib los ntawm qhov tshiab yog kev txhiv dim ntawm kev sib raug zoo ntawm tsev neeg tom qab kev ntxeev siab loj. Piv txwv li, Dianna, leej niam, raug kaw rau hauv kev sib raug zoo tom qab nws tus txiv nraub qaum. Cov menyuam ntxaib txhua tus ua phem rau ib leeg hauv lawv txoj kev

Dab tsi yog lub ntsiab lus 16 ntawm lub rooj zaum?

Dab tsi yog lub ntsiab lus 16 ntawm lub rooj zaum?

Sulfur yog cov khoom siv tshuaj uas sawv cev nrog cov cim tshuaj 'S' thiab tus naj npawb atomic 16 ntawm lub sijhawm teem sijhawm. Selenium yog cov hlau tsis muaj hlau thiab tuaj yeem muab piv rau nws cov khoom tsis yog hlau uas muaj nyob hauv Pawg 16: Cov Tsev Neeg Oxygen, xws li sulfur thiab tellurium

Vim li cas lub hnub nyob hauv ntau txoj haujlwm?

Vim li cas lub hnub nyob hauv ntau txoj haujlwm?

Thawj qhov tseem ceeb ntawm lub hnub txoj kev pom tseeb yog qhov tseeb tias lub ntiaj teb orbits lub hnub thaum tilted ntawm nws axis. Lub ntiaj teb lub axial qaij ntawm kwv yees li 23.5 ° ua kom ntseeg tau tias cov neeg soj ntsuam ntawm qhov chaw sib txawv yuav pom lub hnub mus txog qhov siab dua-lossis-txo txoj haujlwm saum lub qab ntug thoob plaws hauv lub xyoo

Qhov nqus spectrum cuam tshuam li cas rau photosynthesis?

Qhov nqus spectrum cuam tshuam li cas rau photosynthesis?

Pigments nqus lub teeb siv hauv photosynthesis. Hloov chaw, cov kab mob photosynthetic muaj lub teeb-absorbing molecules hu ua pigments uas nqus cov wavelengths tshwj xeeb ntawm pom lub teeb, thaum xav txog lwm tus. Cov txheej ntawm wavelengths absorbed los ntawm ib tug pigment yog nws nqus spectrum

Vim li cas feem ntau asteroids pom nyob rau hauv asteroid siv?

Vim li cas feem ntau asteroids pom nyob rau hauv asteroid siv?

Lub asteroid txoj siv tau tsim los ntawm thawj hnub ci nebula ua ib pawg ntawm planetesimals. Planetesimals yog qhov me me precursors ntawm protoplanets. Nyob nruab nrab ntawm Mars thiab Jupiter, txawm li cas los xij, gravitational perturbations los ntawm Jupiter imbued lub protoplanets nrog ntau lub zog orbital rau lawv mus rau hauv lub ntiaj teb

Qhov feem pua ntawm cov xeeb ntxwv yuav yog heterozygous?

Qhov feem pua ntawm cov xeeb ntxwv yuav yog heterozygous?

Lub Punnett square hauv qab no qhia meej tias txhua qhov kev yug me nyuam yuav muaj 25% txoj hauv kev uas koj muaj ib tus menyuam homozygous (AA) ib txwm muaj, 50% ntawm kev noj qab haus huv heterozygous (Aa) cov menyuam yaus zoo li koj thiab koj tus khub, thiab 25% txoj hauv kev ntawm homozygous recessive (aa) tus me nyuam uas tej zaum yuav kawg tuag los ntawm qhov no

Dab tsi yog erosion rau Chav Kawm 7th?

Dab tsi yog erosion rau Chav Kawm 7th?

(iii) Erosion yog hnav tawm ntawm toj roob hauv pes los ntawm cov neeg ua haujlwm sib txawv xws li dej, cua thiab dej khov. (iv) Thaum dej nyab, txheej ntawm cov av zoo thiab lwm yam khoom hu ua sediments raug tso rau ntawm ntug dej. (vii) Thaum lub voj voog hlais tawm ntawm tus dej loj, nws tsim lub pas dej txiav

Vim li cas sodium thiosulfate siv hauv iodine moos tshuaj tiv thaiv?

Vim li cas sodium thiosulfate siv hauv iodine moos tshuaj tiv thaiv?

Cov tshuaj tiv thaiv moos no siv sodium, potassium lossis ammonium persulfate los oxidize iodide ions rau iodine. Sodium thiosulfate yog siv los txo iodine rov qab mus rau iodide ua ntej iodine tuaj yeem ua rau cov hmoov txhuv nplej siab los ua cov xim xiav-dub

Yuav ua li cas morphogenesis cuam tshuam los ntawm kev tswj cov noob qhia?

Yuav ua li cas morphogenesis cuam tshuam los ntawm kev tswj cov noob qhia?

Gene qhia cuam tshuam morphogenesis los ntawm kev tswj cov kab mob dab tsi yuav tig tawm zoo li. Kev sib txawv ntawm tes txawv li cas ntawm morphogenesis? Kev sib txawv ntawm tes yog thaum qia hlwb ua ntau hom hlwb xws li: tawv nqaij, ntshav, pob txha, thiab lwm yam. Morphogenesis yog kev loj hlob ntawm lub cev

Kev txiav txim siab loj npaum li cas?

Kev txiav txim siab loj npaum li cas?

Txhawm rau xam qhov tsis xws luag: ntxiv qhov loj ntawm txhua tus proton thiab ntawm txhua lub neutron uas tsim cov nucleus, rho tawm qhov tseeb ntawm cov nucleus los ntawm qhov sib xyaw ua ke ntawm cov khoom kom tau txais qhov tsis xws luag

Dab tsi yog brake khau?

Dab tsi yog brake khau?

"Pin Boots" yog me me tubular, ribbed roj hmab Cheebtsam (liab nyob rau hauv daim duab) uas snap rau hauv grooves nyob rau hauv tus swb tus pin thiab kuj lub taag caliper bracket. Lawv txoj haujlwm yog khaws cov dej, xuab zeb thiab av kom deb ntawm qhov swb tus pin bores thiab pab khaws cov roj tshwj xeeb hauv

Dab tsi berries loj hlob nyob rau hauv taiga?

Dab tsi berries loj hlob nyob rau hauv taiga?

Ntau yam txiv hmab txiv ntoo shrubs kuj nyob rau yav qab teb taiga thiab muaj txiaj ntsig tseem ceeb ua liaj ua teb. Koj tuaj yeem nrhiav tau ntau yam ntawm raspberries, bunchberries, cloudberries, thiab cranberries tag nrho hauv taiga. Berries zoo li lingonberries thiab bilberries tuaj yeem loj hlob nyob rau sab qaum teb taiga

Lub cheeb tsam twg yog hu ua carbon dab dej ntawm lub ntiaj teb?

Lub cheeb tsam twg yog hu ua carbon dab dej ntawm lub ntiaj teb?

Dej hiav txwv. Tam sim no, dej hiav txwv yog CO2 dab dej, thiab sawv cev rau cov pa roj carbon ntau tshaj plaws hauv ntiaj teb, nqus ntau tshaj li ib feem peb ntawm cov pa roj carbon dioxide uas tib neeg muab tso rau hauv huab cua. Lub twj tso kua mis solubility yog lub luag haujlwm tseem ceeb rau kev nqus CO2 los ntawm dej hiav txwv

Dab tsi yog cov lej thiab cov lej rational Yuav ua li cas cov ntsiab lus kos rau ntawm lub dav hlau sib koom tes?

Dab tsi yog cov lej thiab cov lej rational Yuav ua li cas cov ntsiab lus kos rau ntawm lub dav hlau sib koom tes?

Raws li peb tau hais, cov ntsiab lus ntawm lub dav hlau sib koom ua ke yog sawv cev raws li (a, b), qhov twg a thiab b yog tus lej lej. Rational cov lej yog cov lej uas tuaj yeem sau ua feem, p / q, qhov p thiab q yog tus lej. Peb hu rau x-coordinate ntawm lub point thiab peb hu b tus y-coordinate ntawm lub point

CM Sephadex yog dab tsi?

CM Sephadex yog dab tsi?

Txheej txheem cej luam. CM Sephadex C-50 yog qhov tsis muaj zog cation exchanger raws li cov ntaub ntawv zoo thiab muaj pov thawj zoo Sephadex puag matrix. Tsis muaj zog cation exchanger haum batch txheej txheem. Siab khi muaj peev xwm

Puas yog lub oval yog ob sab?

Puas yog lub oval yog ob sab?

Hauv kev hais lus, 'oval' txhais tau hais tias ib qho zoo li lub qe los yog lub ellipse, uas tej zaum yuav yog ob sab lossis peb sab. Nws kuj feem ntau hais txog ib daim duab uas zoo li ob lub voj voog sib koom ua ke los ntawm cov duab plaub, xws li kab civliv hauv tshav pob, nrawm skating rink lossis kis las kis las

Puas yog zinc plated zoo dua galvanized?

Puas yog zinc plated zoo dua galvanized?

Zinc plating (tseem hu ua electro-galvanising) yog txheej txheem uas zinc siv los ntawm kev siv hluav taws xob tam sim no. Thaum nws muab qee qhov kev tiv thaiv xeb, nws cov txheej nyias nyias tsis yog xeb resistant li kub dip galvanising. Nws lub ntsiab kom zoo dua yog nws yog pheej yig dua thiab yooj yim rau vuam

Qhov twg yog cov ntaub so ntswg meristematic nyob rau hauv cov nroj tsuag?

Qhov twg yog cov ntaub so ntswg meristematic nyob rau hauv cov nroj tsuag?

Cov ntaub so ntswg meristematic muaj nyob rau hauv ntau qhov chaw, suav nrog ze ntawm cov lus qhia ntawm cov hauv paus hniav thiab stems (apical meristems), nyob rau hauv lub buds thiab nodes ntawm stems, nyob rau hauv lub cambium ntawm lub xylem thiab phloem nyob rau hauv dicotyledonous ntoo thiab shrubs, nyob rau hauv lub epidermis ntawm dicotyledonous ntoo thiab shrubs (cork cambium), thiab nyob rau hauv lub pericycle ntawm

C Gene yog dab tsi?

C Gene yog dab tsi?

Kev Kho Mob Txhais ntawm C noob: ib lub noob uas sau cov ntaub ntawv caj ces rau thaj tsam tas li ntawm ib qho immunoglobulin - piv v gene

Cov kws tshawb fawb dej hiav txwv hu ua dab tsi?

Cov kws tshawb fawb dej hiav txwv hu ua dab tsi?

Tus kws tshawb fawb dej hiav txwv yog ib hom kws tshawb fawb tshwj xeeb uas kawm txog dej hiav txwv. Oceanographers kawm txhua yam sib txawv ntawm dej hiav txwv, xws li chemistry ntawm dej hiav txwv dej, geology cuam tshuam nrog dej hiav txwv, lub cev txav ntawm dej hiav txwv, lossis txawm tias lub neej hu ua dej hiav txwv nws lub tsev

Vim li cas qhov nruab nrab liab ntxiv rau cov qauv poov xab?

Vim li cas qhov nruab nrab liab ntxiv rau cov qauv poov xab?

Liab daj Piav: Cov liab liab diffuses rau hauv cov poov xab thiab hloov liab vim cov kua dej intracellular yog acidic

Muaj pes tsawg tus tub ntxhais electrons puas lub ntsiab oxygen muaj?

Muaj pes tsawg tus tub ntxhais electrons puas lub ntsiab oxygen muaj?

Oxygen muaj 8 electrons --- 2 nyob rau hauv thawj lub plhaub, thiab 6 hauv lub plhaub thib ob (yog li rau valence electrons)

Puas yog poly A tail ib feem ntawm 3 UTR?

Puas yog poly A tail ib feem ntawm 3 UTR?

Thaum lub sij hawm gene qhia, ib qho mRNA molecule yog transcribed los ntawm DNA ib theem zuj zus thiab tom qab ntawd tau muab txhais ua cov protein. Tsis tas li ntawd, 3'-UTR muaj cov kab ke AAUAAA uas qhia ntxiv ntawm ntau pua adenine residues hu ua poly(A) tail mus rau qhov kawg ntawm mRNA cov ntawv sau tseg

Muaj pes tsawg neutrons pom nyob rau hauv lub nucleus ntawm ib lub atom?

Muaj pes tsawg neutrons pom nyob rau hauv lub nucleus ntawm ib lub atom?

Lub atomic mass unit (amu) yog txhais raws nraim li ib feem kaum ntawm cov pa roj carbon atom uas muaj rau protons thiab rau neutrons nyob rau hauv nws cov nucleus. Cov qauv ntawm Atoms. Particle Charge Mass (grams) Protons +1 1.6726x10-24 Neutrons 0 1.6749x10-24

Cov kauj ruam ua haujlwm li cas?

Cov kauj ruam ua haujlwm li cas?

Ib kauj ruam ua haujlwm yog ib txoj haujlwm uas nce lossis txo qis hauv cov kauj ruam los ntawm ib tus nqi tas mus li mus rau tom ntej. Hauv cov kauj ruam ua haujlwm tsev neeg, muaj cov haujlwm hauv pem teb thiab qab nthab ua haujlwm. Kev ua haujlwm hauv pem teb yog ib kauj ruam ua haujlwm uas suav nrog qis kawg ntawm txhua lub sijhawm nkag, tab sis tsis yog qhov kawg siab dua

Vim li cas ib hnub hu ua sol on Mars?

Vim li cas ib hnub hu ua sol on Mars?

Lub sij hawm sol yog siv los ntawm cov kws tshawb fawb ntiaj teb los hais txog lub sijhawm ntawm hnub ci hnub ntawm Mars. Lub sij hawm tau saws thaum lub sij hawm Viking project kom tsis txhob muaj kev ntxhov siab nrog lub ntiaj teb hnub. Los ntawm kev xav, Mars 'lub hnub ci teev' yog 1/24 ntawm lub hnub, thiab hnub ci feeb 1/60 ntawm lub hnub ci teev

Dab tsi yog qhov zoo tshaj plaws txhais ntawm recombinant DNA?

Dab tsi yog qhov zoo tshaj plaws txhais ntawm recombinant DNA?

Recombinant DNA. tsim thaum cov kws tshawb fawb muab cov DNA los ntawm ob qhov sib txawv - feem ntau los ntawm ntau hom - los tsim ib qho DNA molecule. genetic engineering. qhov ncaj manipulation ntawm noob rau lub hom phiaj tswv yim

Yuav ua li cas koj txiav txim siab uas yog tus nqi txiav txim kauj ruam?

Yuav ua li cas koj txiav txim siab uas yog tus nqi txiav txim kauj ruam?

Tus nqi txiav txim siab kauj ruam yog kauj ruam qeeb tshaj plaws ntawm cov tshuaj tiv thaiv tshuaj uas txiav txim siab qhov nrawm (tus nqi) uas tag nrho cov tshuaj tiv thaiv ua tiav. Teb Tus nqi txiav txim kauj ruam yog kauj ruam thib ob vim nws yog kauj ruam qeeb. 2NO + 2H2 → N2 + 2H2O. Cov intermediates hauv cov tshuaj tiv thaiv no yog N2O2 thiab N2O

Dab tsi yog qhov hardness ntawm limestone?

Dab tsi yog qhov hardness ntawm limestone?

Halite muaj qhov zoo meej cleavage thiab hardness ntawm 2.5 ntawm Mohs hardness nplai. Limestone yog qhov ntau tshaj ntawm cov pob zeb uas tsis yog-clastic sedimentary. Limestone yog tsim los ntawm cov ntxhia calcite (calcium carbonate) thiab sediment

Puas yog AP Chem xeem nyuaj?

Puas yog AP Chem xeem nyuaj?

Qhov tseeb yooj yim yog tias AP® Chemistry yog chav kawm nyuaj, tab sis yog tias koj paub tias koj tau txais koj tus kheej li cas thiab npaj raws li, nws muaj peev xwm dhau AP® Chemistry xeem nrog cov qhab nia siab

Lub suab nrov nrov yog dab tsi?

Lub suab nrov nrov yog dab tsi?

Propagation ntawm suab. Lub suab yog ib ntu ntawm cov nthwv dej ntawm lub siab uas nthuav tawm los ntawm cov xov xwm compressible xws li huab cua lossis dej. (Lub suab tuaj yeem nthuav tawm los ntawm cov khib nyiab ib yam nkaus, tab sis muaj ntau hom kev nthuav tawm ntxiv). Thaum lawv nthuav tawm, nthwv dej tuaj yeem cuam tshuam, cuam tshuam, lossis attentuated los ntawm nruab nrab

Hnub thiab hmo ntuj yog dab tsi?

Hnub thiab hmo ntuj yog dab tsi?

Hnub thiab hmo ntuj. Sab nraub qaum yog txias dua thiab tsaus dua, thiab ua rau hmo ntuj. Vim tias lub ntiaj teb tig tsis tu ncua, txoj kab nruab nrab nruab hnub thiab hmo ntuj yog ib txwm txav ncig lub ntiaj teb. Ib hnub hauv ntiaj teb siv sijhawm 24 teev - yog li nws yuav siv sijhawm ntev npaum li cas rau lub ntiaj teb tig ib ncig

Qhov twg yog tus lej atomic ntawm lub rooj zaum?

Qhov twg yog tus lej atomic ntawm lub rooj zaum?

Tus lej atomic yog tus naj npawb ntawm protons hauv lub nucleus ntawm ib lub atom. Tus naj npawb ntawm cov protons txhais tus kheej ntawm ib lub caij (piv txwv li, lub caij nrog 6 protons yog carbon atom, txawm tias muaj pes tsawg neutrons tuaj yeem muaj)