Kev coj tus cwj pwm hloov: Cov tsiaj ua kom muaj sia nyob hauv lawv qhov chaw. Piv txwv yog hibernation, migration, thiab instincts. Piv txwv li: Cov noog ya mus rau sab qab teb thaum lub caij ntuj no vim lawv tuaj yeem nrhiav tau zaub mov ntau dua. Kev hloov kho tus qauv: Ib yam ntxwv ntawm cov nroj tsuag lossis hauv tsiaj lub cev uas pab kom nws muaj sia nyob hauv ib puag ncig
Koj cov ntawv tshawb fawb yuav tsum muaj tag nrho ntawm 2500 txog 3000 lo lus. " Tsis muaj ib qho lus txhais rau lub sij hawm 'kev tshawb fawb ntawv', nws yog ib txwm lees txais los ntawm cov kws tshawb fawb tias daim ntawv tshawb fawb yog lub sij hawm ageneric
Txhais cov dav hlau equatorial .: lub dav hlau perpendicular mus rau spindle ntawm ib tug faib cell thiab nruab nrab ntawm tus ncej
cytoplasm Piv txwv li, inorganic ions txhais li cas? Inorganic ions tseem hu ua ntsev, los yog ntxhia ntsev. Qhov zoo ions tau poob ib lossis ntau dua electrons, thiab tsis zoo ions tau txais ib lossis ntau dua electrons. Qhov kev nce lossis kev poob no feem ntau txhais tau hais tias sab nrauv orbitals (electron shells) ntawm cov atoms txhawj xeeb yog tag nrho, yog li lawv ua kom ruaj khov.
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Ib qho beta particle tsim thaum lub neutron hloov mus rau hauv proton thiab lub zog hluav taws xob siab. Cov proton nyob twj ywm hauv lub nucleus tab sis cov electron tawm ntawm lub atom ua ib qho beta particle. Thaum ib tug nucleus emits ib tug beta particle, cov kev hloov no tshwm sim: tus atomic tooj nce los ntawm 1
Shrubs thiab Vines Tias Tso Tawm Hauv Lub Caij Nplooj Ntoos Hlav 'Deciduous' yog ib qho lus hais thiab txhais tau hais tias cov nroj tsuag tau piav qhia nws cov nplooj thaum kawg ntawm lub caij loj hlob. Lo lus siv feem ntau siv rau cov ntoo, tsob ntoo, thiab vines, sib piv nrog cov uas yog 'evergreen.'
Nyob ze rau qhov kawg ntawm lub sijhawm no, kwv yees li 2.7 txog 2.9 billion xyoo dhau los, raws li Blank, stromatolites, cov kab mob ntawm cov kab mob uas siv photosynthesis los tsim lub zog yam tsis muaj oxygen, thawj zaug tshwm sim
Cov feldspars tau muab faib ua 2 pawg dav: plagioclase, uas muaj calcium thiab sodium; thiab orthoclase, uas muaj cov poov tshuaj
Hloov chaw, tus cab kuj hu ua vector yog genetic engineered kom xa cov noob. Qee cov kab mob feem ntau yog siv los ua cov kab mob vim tias lawv tuaj yeem xa cov noob tshiab los ntawm kev kis mus rau lub cell. Lwm cov kab mob, xws li adenoviruses, qhia lawv cov DNA rau hauv lub nucleus ntawm lub cell, tab sis DNA tsis koom ua ke rau hauv chromosome