Ib yam li ntawd, hauv tib neeg (2n = 46), muaj 46 chromosomes tam sim no thaum metaphase, tab sis 92 chromatids. Nws tsuas yog thaum tus muam chromatids sib cais - ib kauj ruam qhia tias anaphase tau pib - tias txhua tus chromatid raug suav hais tias yog cais, tus kheej chromosome
TSEEM CEEB: Feem ntau temperate, deciduous (nplooj-shedding) hav zoov nyob rau sab hnub tuaj United States, Canada, Europe, Tuam Tshoj, Nyiv, thiab ib feem ntawm Russia. TSEEM CEEB: Lub biome no muaj plaub lub caij hloov nrog rau lub caij ntuj no, caij nplooj ntoos hlav, caij ntuj sov, thiab lub caij nplooj zeeg
Plasmolysis txhais. Plasmolysis yog thaum cog cov cell poob dej tom qab muab tso rau hauv ib qho kev daws teeb meem uas muaj cov ntsiab lus ntau dua li cov cell ua. Qhov no yog hu ua cov tshuaj hypertonic. Qhov no ua rau cov protoplasm, tag nrho cov khoom nyob rau hauv lub cell, kom deb ntawm lub cell phab ntsa
Indirect Variation. Thaum ob qhov kev hloov pauv hloov pauv hauv qhov sib txawv ntawm qhov sib txawv nws yog hu ua indirect variation. Nyob rau hauv indirect variation ib variable yog tas li lub sij hawm inverse ntawm lwm yam. Qhov no txhais tau hais tias cov variables hloov nyob rau hauv ib tug tib ratio tab sis inversely. Cov kab zauv dav dav rau qhov hloov pauv hloov pauv yog Y = K1x
Alleles yog qhov txawv ntawm tib lub noob uas tshwm sim ntawm tib qhov chaw ntawm chromosome. (Los ntawm kev hloov pauv, lawv txawv.) Ib locus yog hais txog qhov chaw nyob ntawm chromosome uas pom cov noob. Loci yog lub plural daim ntawv ntawm locus
Lub chaw ua haujlwm ntub dej, lossis kev sim sim, yog ib hom kev sim uas yuav tsum tau tswj ntau hom tshuaj thiab muaj peev xwm 'ntub' txaus ntshai, yog li chav yuav tsum tau ua tib zoo tsim, tsim, thiab tswj kom tsis txhob nchuav thiab paug
Lub Orion Nebula. Daim ntawv tso cai los ntawm iStockPhoto. npe. Lub ntsiab txhais ntawm ib tug nebula yog huab cua thiab hmoov av nyob rau hauv qhov chaw. Cov plua plav loj saum ntuj uas qhia txog lub teeb thiab tshwm sim li qhov tsaus ntuj hauv lub ntuj yuav yog ib qho piv txwv ntawm nebula
Non-Terminating, Non-Repeating Decimal. Ib tus lej uas tsis raug txiav tawm, tsis rov ua dua yog tus lej lej uas txuas ntxiv mus tas li, tsis muaj pawg lej rov ua tsis tiav. Decimals ntawm hom no tsis tuaj yeem sawv cev ua feem, thiab vim li ntawd yog cov lej tsis sib xws
Gram positive rods tsawg dua li Gram negative rods. Tag nrho cov seem yog Gram negative rods. Gram zoo rods; Actinomyces, Atopobium, Bacillus, Bifidobacterium, Clostridium, Corynebacterium, Erysipelothrix, Gardnerella, Listeria, Lactobacillus, Mycobacterium sp
F plasmid. F plasmid yog ib qho piv txwv ntawm cov plasmid loj, uas muaj cov noob uas tso cai rau cov plasmids DNA hloov ntawm cov hlwb. Qhov kev koom nrog ntawm pilus thiaj li hloov DNA ntawm cov kab mob hu ua conjugation. Yog li F plasmid yog lub npe hu ua conjugative plasmid
Mitosis hauv eukaryotic hlwb Loj hlob hauv tsiaj thiab nroj tsuag. Nyob rau hauv cov tsiaj mitosis rau kev loj hlob tshwm sim thoob plaws hauv lub cev mus txog rau thaum tus tsiaj yog ib tug neeg laus thiab kev loj hlob nres. Hauv cov nroj tsuag mitosis tshwm sim thoob plaws lub neej hauv thaj chaw loj hlob hu ua meristems
rau xyoo Dhau li ntawm no, muaj hnub nyoog dab tsi hauv keeb kwm? Lwm txoj kev thoob ntiaj teb keeb kwm muab faib ua peb yam muaj hnub nyoog los yog lub sij hawm: Ancient Keeb kwm (3600 B.C.-500 A.D.), nruab nrab Hnub nyoog (500-1500 AD), thiab niaj hnub Hnub nyoog (1500-tam sim no).
Re: Exposed romex NM cable raug tso cai khiav tawm ntawm qhov chaw ntawm lub tsev tiav. Yog tias muaj kev puas tsuaj rau lub cev ces nws yuav tsum muaj kev tiv thaiv ntxiv. Lub sij hawm ua rau lub cev puas tsuaj tsis tau txhais los ntawm NEC yog li nws dhau los ua qhov teeb meem txhais lus
Nyob rau hauv kho qhov muag mineralogy thiab petrography, ib tug nyias (los yog petrographic nyias seem) yog ib lub chaw kuaj pob zeb, ntxhia, av, lauj kaub tais diav, pob txha, los yog txawm hlau qauv siv nrog ib tug polarizing petrographic microscope, electron microscope thiab electron microprobe
Tsis sib haum xeeb. Yog tias cov tib neeg tsis sib haum xeeb nrog lwm tus neeg hauv cov pej xeem, piv txwv li lawv xaiv lawv tus khub, kev xaiv tuaj yeem ua rau muaj kev hloov pauv hauv cov pej xeem. Ib qho laj thawj yog kev xaiv khub niam txiv yooj yim lossis xaiv kev sib deev; Piv txwv li, poj niam peahens yuav nyiam peacocks nrog loj dua, ci dua tails
Homogeneous sib tov muaj tib yam muaj pes tsawg leeg thoob plaws, thiab tus kheej ntawm cov khoom sib tov tsis yooj yim txheeb xyuas. Homogeneous sib tov kuj tseem hu ua kev daws teeb meem
Ib txwm Creosote tsuas yog muag rau Cov Neeg Siv Khoom. Txawm li cas los xij, cov khoom lag luam tseem muaj muag rau cov lag luam-cov neeg. Qhov no txhais tau hais tias cov neeg siv ib txwm siv xws li cov zej zog ua liaj ua teb, cov neeg tsim khoom, thiab lwm yam tseem tuaj yeem yuav Coal Tar Creosote, muab lawv tsis rov muag rau tus tswv tsev
Quadratic functions tuaj yeem sawv cev los ntawm kev sib npaug, y(x) = ax2 + bx + c, qhov twg a, b, thiab c yog qhov tsis tu ncua, thiab a ≠ 0. Daim foos no raug xa mus rau daim ntawv qauv
Phytoplankton
Chlorine gas bleached daim ntawv litmus. Qhov no yog vim muaj cov hypochlorite ions. Yog li, thaum chlorine (txhua daim ntawv) ntxiv rau hauv dej, cov kua qaub tsis muaj zog hu ua Hypochlorousacid yog tsim. Nws yog cov kua qaub no, tsis yog cov tshuaj chlorine, uas muab dej nws lub peev xwm los oxidize thiab tua kab mob
Ib lub zos yog ib qho chaw me me feem ntau pom nyob rau hauv qhov chaw nyob deb nroog. Nws yog feem ntau loj dua ib 'lub zos' tab sis me dua ib 'lub zos'. Qee cov kws tshawb fawb tshwj xeeb txhais cov av uas muaj nyob nruab nrab ntawm 500 thiab 2,500 tus neeg nyob. Nyob rau hauv feem ntau ntawm lub ntiaj teb no, cov zos yog cov neeg nyob ib ncig ntawm lub hauv paus ntsiab lus
Mantle convection yog qhov qeeb qeeb qeeb ntawm lub ntiaj teb cov khoom silicate mantle tshwm sim los ntawm convection currents nqa cua sov los ntawm sab hauv mus rau lub ntiaj teb saum npoo. Lub ntiaj teb saum npoo lithosphere caij saum lub asthenosphere thiab ob qho tib si tsim cov khoom ntawm lub tsho loj
Yellowstone National Park zaum square ntawm lub roob hluav taws loj heev. Yellowstone muaj peev xwm ua kom tawg tau ntau txhiab zaus ntau dua li Mount St. Helens tawg thaum xyoo 1980. Sab qaum teb Rockies yuav raug faus rau hauv ntau qhov taw ntawm tshauv
Lub gametophyte yog theem kev sib deev hauv lub neej voj voog ntawm cov nroj tsuag thiab algae. Nws tsim cov kab mob sib deev uas tsim gametes, haploid pw ua ke hlwb uas koom nrog hauv fertilization los tsim ib tug diploid zygote uas muaj ob pawg chromosomes
Dej yog ib qho 'polar' molecule, txhais tau hais tias muaj kev faib tsis sib xws ntawm electron ceev. Dej muaj ib feem tsis zoo nqi () nyob ze ntawm cov pa atom vim cov unshared khub ntawm electrons, thiab ib nrab nqi zoo () nyob ze hydrogen atoms
Lub sijhawm tus lej yog tus lej uas tau muab rau ib pawg ntawm cov ntsiab lus thoob plaws lub sijhawm uas tau ua ib puag ncig los ntawm kev ua tiav nws lub plhaub sab nraud. Qhov qauv no feem ntau pib nrog Pawg I lub caij thiab xaus nrog Pawg 8 lub ntsiab lus. Piv txwv li, lub sijhawm kuv yuav yog los ntawm hydrogen tohelium
20 Xyoo Tom Qab Pinatubo: Yuav Ua Li Cas Volcanoes tuaj yeem hloov pauv huab cua. Tom qab ntawd, thaum Lub Rau Hli 15, lub roob hluav taws tau tawg nws sab saum toj hauv qhov thib ob loj tshaj plaws volcanic eruption ntawm lub xyoo pua. Cov roob hluav taws no tsis yog metronomes; lawv nyiam sib txawv ntawm ib lub ntsiab lus. Txawm hais tias peb tsis cia siab tias yuav pom ib zaug ntxiv hauv peb lub neej, nws tsis yog ua tsis tau.'
'U-shaped kev sib raug zoo' tsis yog ib lub sij hawm ua lej thiab tsis muaj kev lees paub thoob ntiaj teb. Nws feem ntau txhais tau hais tias kev sib raug zoo yog thawj zaug txo qis thiab tom qab ntawd nce, lossis rov ua dua
Muaj plaub hom kev lom macromolecules: carbohydrates, lipids, proteins, thiab nucleic acids. Cov polymers no yog tsim los ntawm cov monomers sib txawv thiab ua haujlwm sib txawv. Carbohydrates: molecules tsim los ntawm qab zib monomers. Lawv tsim nyog rau lub zog cia
Thawj qhov xwm txheej ntawm Equilibrium Rau ib qho khoom yuav tsum nyob rau hauv equilibrium, nws yuav tsum tau ntsib tsis muaj acceleration. Qhov no txhais tau hais tias ob qho tib si lub zog ntawm lub zog thiab lub zog ntawm qhov khoom yuav tsum yog xoom. Lub zog ua rau nws ntxiv mus rau xoom. Ob lub zog yog ntsug hauv qhov no
Cov txheej txheem triple-alpha yog ib txheej ntawm cov tshuaj tiv thaiv kev sib xyaw ua ke uas peb lub helium-4 nuclei (alpha hais) tau hloov mus ua cov pa roj carbon
Txhua square ntawm lub sij hawm muab cov ntaub ntawv tshwj xeeb txog cov atoms ntawm lub caij. Tus lej nyob rau sab saum toj ntawm lub square yog tus naj npawb atomic, uas yog tus naj npawb ntawm protons nyob rau hauv lub nucleus ntawm lub atom ntawm lub caij. Cov cim tshuaj lom neeg yog ib qho luv luv rau lub caij lub npe. Nws muaj ib lossis ob tsab ntawv
Lub cosine (feem ntau abbreviated 'cos') yog qhov piv ntawm qhov ntev ntawm sab uas nyob ib sab mus rau lub kaum sab xis mus rau qhov ntev ntawm lub hypotenuse. Thiab lub tangent (feem ntau abbreviated 'tan') yog qhov piv ntawm qhov ntev ntawm sab opposite lub kaum sab xis rau qhov ntev ntawm sab uas nyob ib sab. SOH → sin = 'opposite' / 'hypotenuse'
Lub Winkel tripel projection (Winkel III), ib qho kev hloov kho azimuthal map projection ntawm lub ntiaj teb, yog ib qho ntawm peb qhov projection uas tau npaj los ntawm German cartographer Oswald Winkel (7 Lub Ib Hlis 1874 - 18 Lub Xya Hli 1953) hauv 1921
Cov txheej txheem caj ces yog cov txheej txheem uas siv los ntawm cov hlwb uas muaj sia nyob los txhais cov ntaub ntawv hauv cov khoom siv caj ces (DNA lossis mRNA cov kab ke ntawm nucleotide triplets, lossis codons) rau hauv cov protein. Txoj cai txhais li cas codons qhia meej tias cov amino acid yuav muab ntxiv tom ntej thaum lub sij hawm tsim cov protein
Nrog rau lwm cov atoms, fluorine tsim cov polarcovalent bonds los yog ionic bonds. Feem ntau, covalent bonds uas muaj fluorine atoms yog singlebonds, txawm hais tias tsawg kawg yog ob qho piv txwv ntawm kev txiav txim siab dua muaj nyob. Fluoride tuaj yeem ua raws li kev sib txuas ntawm ob lub hlau hauv qee cov molecules complex
Kos ib qho nkhaus los ntawm thawj qhov tseem ceeb hloov pauv mus rau qhov thib ob-qhov tseem ceeb hloov pauv thiab tom qab ntawd los ntawm qhov thib peb. Yog hais tias qhov nkhaus mus clockwise, lub chiral center yog xaiv R; Yog hais tias qhov nkhaus mus counterclockwise, lub chiral center yog xaiv S
Kauj Ruam 1: Sau cov lej paub thiab npaj qhov teeb meem. Siv qhov kev tawm tsam kev nyuaj siab egin{align*}(Delta T_f)end{align*} los xam cov molality ntawm cov tshuaj. Tom qab ntawd siv qhov sib npaug molality los xam cov moles ntawm solute. Tom qab ntawd faib cov grams ntawm solute los ntawm moles los txiav txim qhov molar loj
Oxidative phosphorylation yog cov txheej txheem uas ATP yog tsim raws li cov khoom siv hluav taws xob hloov pauv los ntawm cov ntaub ntawv txo qis ntawm nicotinamide adenine dinucleotide (NADH) thiab flavin adenine dinucleotide (FADH2) mus rau molecular oxygen (O2) los ntawm cov khoom siv hluav taws xob thauj khoom (xws li cov saw hlau thauj hluav taws xob. )
Heterolactic fermentation, zoo li cov txheej txheem homolactic hauv cov leeg nqaij, siv cov piam thaj los ua cov reactant thiab tshwm sim anaerobically. Cov khoom los ntawm txoj kev no, txawm li cas los xij, yog ib qho molecule ntawm lactic acid, ib lub molecule ntawm ethanol thiab ib molecule ntawm carbon dioxide