2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
A tapetum yog txheej sab hauv ntawm phab ntsa anther uas nyob ib puag ncig cov ntaub so ntswg sporogenous. Tapetal cells nourish the developing pollen grains/Microsporocytes. Nws kuj ua raws li qhov ua ntej ntawm lub tsho paj ntoos.
Dab tsi yog txoj haujlwm ntawm tapetum?
Cov tapetum yog txheej sab hauv ntawm phab ntsa anther thiab nyob ib puag ncig cov ntaub so ntswg. Nws ua lub luag haujlwm tseem ceeb hauv pollen txoj kev loj hlob, uas yog kev noj haus ntawm micro-spores thiab tsim ntawm exine. Nyob rau theem kawg ntawm pollen maturation, cov khoom siv tapetal koom nrog hauv deposition ntawm tryphine thiab pollenkitt.
Dab tsi yog lub luag haujlwm ntawm tapetum luv teb?
Tapetum yog txheej sab hauv ntawm microsporangium. Nws muab khoom noj rau cov qoob loo loj hlob. Thaum lub sij hawm microsporogenesis, lub hlwb ntawm tapetum tsim ntau yam enzymes, cov tshuaj hormones, amino acids, thiab lwm yam khoom noj uas yuav tsum tau rau kev loj hlob ntawm paj paj noob qoob loo.
Peb txoj haujlwm ntawm tapetum yog dab tsi?
"Sau cov haujlwm ntawm tapetum." (i) Nws muab khoom noj khoom haus rau cov tsim microspores. (ii) Nws txhawb nqa sporopoleenin los ntawm ubisch lub cev yog li ua lub luag haujlwm tseem ceeb hauv kev tsim cov paj paj ntoo. (iii) Cov khoom paj ntoos yog pab los ntawm cov kab xev nplaum thiab tom qab ntawd xa mus rau paj ntoos nto.
Qhov twg tsis yog lub luag haujlwm ntawm tapetum?
Ua li casCov hauv qab no tsis ua haujlwm ntawm tapetum?
Pom zoo:
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Dab tsi yog txoj haujlwm ntawm txoj kev internodal?
Cov kab mob anterior internodal dhau los ntawm qhov sinus node sinus node Lub sinoatrial node (SA node) yog tus qauv myocardial tshwj xeeb uas pib cov hluav taws xob impulses los txhawb kev cog lus, thiab pom nyob rau hauv lub atrial phab ntsa ntawm qhov sib txuas ntawm superior caval leeg thiab sab xis atrium (Mikawa thiab Hurtado, 2007).
Dab tsi yog kev xav ntawm autonomists dab tsi yog qhov kev xav ntawm kev zoo nkauj ntawm kev coj ncaj ncees?
Kev lig kev cai, muaj ob txoj haujlwm tawm tsam kev xav txog kev coj ua raws li kev cai lij choj ntawm kev ntsuas kev ncaj ncees ntawm kev kos duab: 'kev coj ncaj ncees kev ncaj ncees Ethics lossis kev coj ncaj ncees yog ib ceg ntawm kev xav uas "
Lub luag haujlwm twg yog txoj cai tswjfwm rau cov kev kawm residuary chav kawm 10?
Nyob hauv Is Nrias teb, Union tsoom fwv muaj lub zog los tsim kev cai lij choj ntawm kev kawm ntxiv. Txoj cai tswjfwm twg yog cov cai lij choj ntawm Union daim ntawv teev npe chav kawm 10? Central Bureau of Intelligence and Investigation.
Kuv puas tuaj yeem tau txais txoj haujlwm nrog daim ntawv kawm tiav los ntawm tsev kawm ntawv qib siab?
Feem ntau cov tswv lag luam hwm ib daim ntawv kawm tiav los ntawm Strayer University vim nws yog tau lees paub hauv cheeb tsam tau lees paub Kev lees paub Kev Kawm Qib Siab hauv Tebchaws Meskas yog cov txheej txheem tshuaj xyuas cov phooj ywg uas siv tau qib siab thiab cov qhab nia muab los ntawm cov tsev kawm qib siab yog assured.
