Cov duab khoom yog cov duab peb sab uas muaj qhov ntev, dav thiab qhov siab. Saib qee qhov piv txwv ntawm cov duab peb sab hauv qab no. Lub prism yog ib lub polyhedron nrog raws nraim ob lub ntsej muag uas yog congruent thiab parallel. Cov ntsej muag no hu ua lub hauv paus. Lwm lub ntsej muag hu ua lateral faces
Plaub theem ntawm mitosis yog prophase, metaphase, anaphase thiab telophase (Daim duab hauv qab). Prophase: Cov chromatin, uas yog unwound DNA, condenses tsim chromosomes. Telophase: Cov spindle yaj thiab cov hnab ntawv nuclear tsim nyob ib ncig ntawm chromosomes hauv ob lub hlwb
Dab tsi yog qhov thickest sab hauv txheej ntawm lub ntiaj teb? Qhov thinnest? Lub mantle yog thaj tsam tuab tshaj plaws ntawm txog 2900 km. Lub crust yog qhov thinnest, thaj tsam li 6 txog 70 km tob
Lub ntiaj teb huab cua yog 78% nitrogen, 21% oxygen, 0.9% argon, thiab 0.03% carbon dioxide nrog feem pua me me ntawm lwm cov ntsiab lus. Peb qhov chaw kuj muaj dej vapor. Tsis tas li ntawd, lub ntiaj teb huab cua muaj cov kab ntawm cov hmoov av, paj ntoos, cov nplej nplej thiab lwm yam khoom siv
Txhua yam kab mob xav tau plaub hom organic molecules: nucleic acids, proteins, carbohydrates thiab lipids; lub neej tsis tuaj yeem nyob yog tias ib qho ntawm cov molecules no ploj lawm. Nucleic Acids. Cov nucleic acids yog DNA thiab RNA, los yog deoxyribonucleic acid thiab ribonucleic acid, feem. Cov protein. Carbohydrates. Lipids
Cov qauv uas tau poob lawv txoj kev siv los ntawm kev hloov pauv yog hu ua vestigial structures. Lawv muab pov thawj rau evolution vim hais tias lawv hais tias ib tug kab mob hloov los ntawm kev siv tus qauv mus tsis siv tus qauv, los yog siv rau ib tug txawv lub hom phiaj
Liab Alder (Alnus rubra) Bigleaf Maple (Acer macrophyllum) Cascara (Rhamnus purshiana) Oregon dawb ntoo qhib (Quercus garryana) Pacific Dogwood (Cornus nuttallii) Willamette Valley Ponderosa Pine (Pinus ponderosa) Vine maple (Acer circinuszoneum)
Raws li qhov zoo sib xws, cov kws tshawb fawb muaj peev xwm faib cov nroj tsuag sib txawv rau hauv 5 pawg hu ua noob nroj tsuag, ferns, lycophytes, horsetails, thiab bryophytes
Tus skater lub zog kinetic yog nyob rau ntawm nws siab tshaj plaws nyob rau hauv qab ntawm lub ramp, raws li tsis muaj leej twg tau siv nws. Lub zog muaj peev xwm tau raug siv kom tau tus skater mus rau hauv qab yog tias txoj kev
Txawm hais tias lub zog tsim los ntawm fission yog piv rau qhov tsim los ntawm fusion, lub hnub ci tseem ceeb ntawm hydrogen thiab ntawm qhov kub thiab txias qhov twg hydrogen fusion ua tau, yog li ntawd lub zog tseem ceeb ntawm ib lub cubic meter yog nyob rau hauv fusion es lub fission. ntawm cov xov tooj cua isotopes tsawg heev
Kev sib txhuam. Thaum lub ntiajteb txawj nqus yog ib qho tseem ceeb ntawm physics rau qhov chaw ua si swb, kev sib txhuam yog qhov tseem ceeb sib npaug. Kev sib txhuam ua haujlwm tiv thaiv lub ntiajteb txawj nqus kom qeeb tus neeg qhovntsej thiaj tsis mob ntawm tus swb. Kev sib txhuam yog ib qho quab yuam uas tshwm sim thaum twg ob yam khoom rub tawm rau ib leeg, xws li swb thiab ib tus neeg lub nraub qaum
Hauv kev puas siab puas ntsws, txoj kev xav zoo (tseem hu ua kev xav txog kev xav) yog ib txoj hauv kev rau kev kawm txog tib neeg tus cwj pwm. Trait theorists feem ntau txaus siab rau qhov ntsuas ntawm qhov zoo, uas tuaj yeem txhais tau tias yog tus cwj pwm ntawm tus cwj pwm, kev xav, thiab kev xav
Lub pilus yog cov qauv zoo li cov plaub hau cuam tshuam nrog cov kab mob adhesion thiab cuam tshuam rau cov kab mob colonization thiab kab mob. Pili feem ntau yog tsim los ntawm oligomeric pilin proteins, uas npaj helically tsim ib lub tog raj kheej
Nws yog siv los sib txawv ntawm cov kab mob gram zoo thiab cov kab mob gram tsis zoo. Yog li ntawd, nws yog qhov txawv txav. Decolorizing lub cell ua rau cov phab ntsa tuab no kom lub cev qhuav dej thiab ntsws, uas kaw cov pores hauv phab ntsa ntawm tes thiab tiv thaiv cov stain tawm ntawm lub cell
Muaj qhov sib txawv tseem ceeb hauv txoj kev lub zog thiab cov teeb meem ntws los ntawm ib qho ecosystem. Cov teeb meem ntws los ntawm ecosystem nyob rau hauv daim ntawv ntawm cov tsis muaj sia nyob cov as-ham tseem ceeb rau cov kab mob nyob. Yog li koj pom, teeb meem yog rov ua dua tshiab hauv ecosystem. Tsis zoo li qhov teeb meem, lub zog tsis rov siv dua los ntawm qhov system
Txiav eucalyptus nyob rau nruab nrab ntawm nws lub caij cog qoob loo thaum cov nroj tsuag ua pa ua haujlwm zoo tshaj plaws. Cutbranches tsawg kawg yog 18 nti ntev thiab strip cov nplooj rau hauv qab 6 ntiv tes ntawm ceg. Tshem tawm cov nplooj orshiveled puas lawm
Kev nyab xeeb: Kev nyab xeeb huab cua ntub thiab qhuav muaj nyob hauv thaj chaw uas muaj kev loj hlob savanna. Qhov ntsuas kub txhua hli yog nyob ntawm lossis siab dua 64 ° F thiab nag lossis daus txhua xyoo nruab nrab ntawm 30 thiab 50 ntiv tes. Rau tsawg kawg tsib lub hlis ntawm lub xyoo, thaum lub caij qhuav, tsawg dua 4 ntiv tes ib hlis tau txais
Tag nrho cov kab mob muaj sia nyob tau muab faib ua pawg raws li qhov yooj yim, sib koom ua ke. Cov pab pawg tshwj xeeb no tau sau ua ke hu ua kev faib tawm ntawm cov khoom muaj sia. Kev faib tawm ntawm cov khoom muaj sia muaj xws li 7 qib: lub nceeg vaj, phylum, chav kawm, kev txiav txim, tsev neeg, genus, thiab hom
Kev Hla Hla Hla yog qhov sib pauv ntawm cov khoom siv caj ces uas tshwm sim hauv kab kab mob. Thaum lub sij hawm tsim cov qe thiab cov phev hlwb, tseem hu ua meiosis, ua ke chromosomes los ntawm txhua tus niam txiv sib dhos kom cov DNA zoo sib xws los ntawm cov khub chromosomes hla ib leeg
Muaj peb hom seismic nthwv dej - P-waves, S-yoj thiab nthwv dej saum npoo. P-wave thiab S-waves qee zaum hu ua lub cev tsis muaj zog
Cov nyom tuaj yeem dhia 200 npaug ntawm nws lub cev. Nws yog TRUE. Nrog lawv ob txhais ceg muaj zog, cov nyom tuaj yeem dhia ntawm 16 thiab 23 ft. (5 thiab 7 m) lossis 200 npaug ntawm lawv tus kheej
Hauv nplooj ntawv no koj tuaj yeem tshawb pom 29 cov lus sib txawv, cov lus sib txawv, cov lus qhia tsis zoo, thiab cov lus hais txog thaj av, xws li: av, thaj chaw, thaj chaw, thaj chaw, thaj chaw, thaj chaw, thaj chaw, bailiwick, lub voj voog, chav haujlwm thiab thaj chaw
Ib qho lus sau ua cov lus piav qhia los ntawm lwm qhov ntawm kev hais lus, tshwm sim hauv Greek thiab Latin lo lus qiv nyiaj (hlau; poetic; archaic; pej xeem) thiab, ntawm tus qauv no, siv los ua ib qho kev sib txuas lus nrog cov lus tshwj xeeb "muaj qee yam ntawm" ( opposed to the simple attributive siv lub hauv paus noun) (
Ib qho enzyme inhibitor yog molecule uas khi rau ib qho enzyme thiab txo nws txoj haujlwm. Kev khi ntawm tus inhibitor tuaj yeem nres lub substrate los ntawm kev nkag mus rau lub enzyme lub chaw ua haujlwm thiab / lossis cuam tshuam cov enzyme los ntawm kev ua rau nws cov tshuaj tiv thaiv. Inhibitor binding yog thim rov qab los yog irreversible
Nws tau pom nyob rau xyoo 1960. Pob kws raws li peb paub nws zoo nkaus li txawv ntawm nws cov poj koob yawm txwv qus. Lub qub cob yog tsawg tshaj li 10 feem pua ntawm qhov loj ntawm cov pob kws niaj hnub, ntawm txog 2cm (0.8inch) ntev. Thiab cov cob qhia thaum ub tsim tau yim kab ntawm cov noob, txog ib nrab ntawm cov pob kws niaj hnub
Cov units ntawm huab hwm coj (qhov hnyav) nyob rau hauv metric system iskilograms thiab grams. Thaum koj paub ob qhov ceev thiab qhov loj, faib qhov loj los ntawm qhov ntom kom pom qhov ntim. Yog tias koj xav xam qhov ntim hauv milliliters, ntsuas qhov hnyav hauv grams
Cohesiveness, adhesiveness, thiab nto nro: yuav txo qis vim tias tsis muaj +/- polarity, dej yuav tsis tsim hydrogen bonds ntawm H20 molecules. Raws li qhov tshwm sim, dej yuav tsis "hloov" nce (skcking rau nws tus kheej), lossis skck mus rau lwm qhov chaw zoo, lossis tsim cov chaw uas tuaj yeem txhawb nqa me me ntawm qhov siab
DNA tshiab yog tsim los ntawm enzymes hu ua DNA polymerases, uas yuav tsum tau ib tug template thiab ib tug primer (pib) thiab synthesize DNA nyob rau hauv lub 5' mus rau 3' kev taw qhia. DNA replication xav tau lwm yam enzymes ntxiv rau DNA polymerase, suav nrog DNA primase, DNA helicase, DNA ligase, thiab topoisomerase
Lub hnub ci muab lub zog xav tau rau photosynthesis coj qhov chaw. Hauv cov txheej txheem no cov pa roj carbon dioxide thiab dej tau hloov mus rau hauv cov pa oxygen (cov khoom pov tseg uas tau tso rov qab rau hauv huab cua) thiab qabzib (lub zog ntawm cov nroj tsuag)
Cov txheej txheem tshuaj yooj yim tshaj plaws suav nrog gravimetry thiab titration. Kuj tseem muaj ntau txoj kev teeb pom kev zoo los yog spectroscopic, xws li UV-VIS spectroscopy, nuclear magnetic resonance thiab infrared spectroscopy. Cov txheej txheem chromatographic, xws li roj chromatography thiab kua chromatography, kuj tseem siv tau
Kev hloov pauv ntawm cov tshuaj X yog 0.5mL / 40mg. Yog hais tias qhov xav tau concentration yog 4mg hauv 1mL, ces 20mL yog xav tau rau 80mg ntawm tshuaj X. Yog hais tias 40mg displaces 0.5mL ntawm cov tshuaj, nws txhais tau tias 80mg displaces 1mL. 20mL - 1mL = 19mL ntawm diluent xav tau
Thaum Botrytis blight ntawm peony yog ib qho teeb meem, tsis txhob siv tuab, ntub mulches thiab siv thawj fungicide spray thaum ntxov caij nplooj ntoos hlav ib yam li cov liab tua pib thawb tawm hauv av. Nrog kev soj ntsuam tas li thiab ua tib zoo tu cov pwm grey tuaj yeem tswj tau zoo
Democratic Republic of the Congo, lub teb chaws nyob hauv Central Africa. Lub npe hu ua Democratic Republic of the Congo, lub teb chaws muaj 25-mais (40-km) ntug hiav txwv dej ntawm Dej Hiav Txwv Atlantic tab sis yog txwv tsis pub muaj av. Nws yog lub teb chaws thib ob loj tshaj plaws nyob rau sab av loj; tsuas yog Algeria loj dua
Peb DNA yog 99.9% ib yam li tus neeg nyob ib sab ntawm peb - thiab peb xav tsis thoob zoo li ntau yam muaj sia nyob. Peb lub cev muaj 3 billion genetic tsev blocks, los yog lub hauv paus khub, uas ua rau peb yog leej twg
Muaj ntau ntau hom cloning vectors, tab sis cov feem ntau siv yog cov genetically engineered plasmids. Cloning feem ntau ua ntej siv Escherichia coli, thiab cloning vectors hauv E. coli muaj xws li plasmids, bacteriophages (xws li phage λ), cosmids, thiab cov kab mob sib xyaw chromosomes (BACs)
Ib qho tsis tuaj yeem qhia los ntawm daim duab no, tab sis vim tias chlorophyll ib lub teeb liab, peb tuaj yeem kwv yees tias nws yuav ua tau zoo hauv kev tsav tsheb photosynthesis. Cov xim no muaj peev xwm nqus tau ntau lub teeb ntawm lub teeb (thiab yog li ntau lub zog) dua li chlorophyll ib leeg tuaj yeem nqus tau
Phosphorus yog cov hlau tsis muaj hlau uas nyob hauv qab nitrogen hauv pawg 15 ntawm lub sijhawm. Cov khoom no muaj nyob rau hauv ntau hom, uas yog dawb thiab liab yog qhov zoo tshaj plaws paub. Dawb phosphorus yog twv yuav raug hu ntau exciting ntawm ob
Rhodochrosite yog manganese carbonate ntxhia nrog tshuaj muaj pes tsawg leeg MnCO3. Hauv nws daim ntawv dawb huv (tsis tshua muaj), nws feem ntau yog xim liab-liab, tab sis cov qauv tsis huv tuaj yeem ua xim liab rau xim av daj. Nws streaks dawb, thiab nws cov Mohs hardness txawv ntawm 3.5 thiab 4. Nws lub ntiajteb txawj nqus yog nruab nrab ntawm 3.5 thiab 3.7
Muaj ntau ntau hom teeb meem Environmental hauv Canada uas suav nrog huab cua thiab dej paug, kev hloov pauv huab cua, mining thiab txiav. Cov xwm txheej no tsis yog pom hauv Canada xwb tab sis pom thoob plaws ntiaj teb
Lub hydronium ion concentration tuaj yeem pom los ntawm pH los ntawm kev thim rov qab ntawm kev ua lej ua haujlwm los nrhiav pH. [H3O+] = 10-pH lossis [H3O+] = antilog (- pH) Piv txwv: Dab tsi yog hydronium ion concentration hauv cov tshuaj uas muaj pH ntawm 8.34?