2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Teb tiav: Lawv yog polyploidy. Cov kab mob tapetal pom qhov nce hauv lawv cov ntsiab lus DNA.
Ploidy ntawm tapetal cells yog dab tsi?
Tapetum yog nyob rau hauv anther uas txhawb rau kev nce qib ntawm hmoov av. nws yog diploid. … Nco qab tias hauv cov nroj tsuag txhua lub hlwb yog diploid ib sab ntawm plua plav nplej thiab poj niam gametophyte (cov kab mob hauv lub cev) uas yog haploid, thiab tom qab kev kho mob endosperm zoo li tus uas yog triploid.
Puas yog generative cell haploid lossis diploid?
A haploid cell, hu ua generative cell, taug kev hauv lub paj paj ntoos. Lub generative cell mus tom qab lub raj nucleus, uas yog lub nucleus ntawm lub cell loj uas ua rau ntau ntawm cov paj ntoos raj thiab nplej. Lub generative cell faib los ntawm mitosis los tsim ob haploid phev hlwb.
Dab tsi yog tapetal cells?
Cov tapetum yog txheej txheej tshwj xeeb ntawm cov hlwb pom nyob rau hauv lub anther, ntawm cov paj ntoo, qhov chaw nws nyob nruab nrab ntawm cov ntaub so ntswg sporangenous thiab phab ntsa anther. Tapetum yog ib qho tseem ceeb rau kev noj haus thiab kev loj hlob ntawm paj ntoos nplej, nrog rau qhov chaw ntawm cov khoom ua ntej rau lub tsho paj ntoos.
P tapetum thiab C tapetum yog dab tsi?
Tus p-tapetum nrog cov hlwb me tau muab los ntawm parietal txheej thiab c-tapetum nrog cov hlwb loj yog los ntawm cov ntaub so ntswg sib txuas. … Cov tsos mob tshwm sim tau pib tshwm sim hauv cov kab mob c-tapetal hauv cov hnab paj ntoos sib txawv thaum lub sij hawm meiosis,tetrads lossis microspore theem. Feem ntau c-tapetal hlwb degenerated ua ntej tshaj p-tapeteum.
Pom zoo:
Puas yog jejunum muaj goblet cells?
Qhov txawv ntawm ileum yog qhov muaj cov pab pawg loj ntawm cov qog ntshav hauv cov lamina propria hu ua Peyer's thaj ua rau thaj. Cov plicae circulares (valve ntawm Kerckring) nyob rau hauv cov swb no tsis yog ib yam li cov uas pom nyob rau hauv duodenum thiab jejunum.
Puas yog xim-sensitized solar cells?
Dye-sensitized solar cells (DSSCs) tau tshwm sim los ua ib qho txuj ci thiab kev lag luam muaj txiaj ntsig zoo rau p-n junction photovoltaic li. Thaum xyoo 1960s, nws tau tshawb pom tias hluav taws xob tuaj yeem tsim los ntawm cov hluav taws xob hluav taws xob hauv cov hluav taws xob hluav taws xob.
Puas yog goblet cells holocrine?
Tsis tas li ntawd, nws feem ntau xav tias cov hlwb goblet sib txawv los ntawm cov kab mob goblet ntawm txoj hnyuv hauv tsuas yog nchuav ib zaug, ejecting lawv secretion thiab nucleus, i. e. nyob rau hauv muaj holocrine secretion, thaum lub plab hnyuv goblet hlwb muaj apocrine secretion (Stieda 1890, Parsons 1904, Wolff … Dab tsi yog goblet cells cais raws li?
Puas yog mesenchymal stromal cells qia hlwb?
Stromal cells - tseem hu ua mesenchymal stem cells (MSCs) - yog non-hematopoietic, ntau lub zog, lub hlwb rov ua dua tshiab uas muaj peev xwm ntawm trilineage sib txawv (mesoderm, ectoderm, thiab endoderm). Puas yog mesenchymal stem cells?
Puas yog epidermis guard cells?
Cov hlwb yog cov hlwb tshwj xeeb hauv cov epidermisntawm nplooj, stems thiab lwm yam kabmob uas siv los tswj kev sib pauv roj. Lawv raug tsim ua khub nrog qhov sib txawv nruab nrab ntawm lawv uas ua rau lub qhov pore. Cov kab mob thiab cov ntaub so ntswg epidermal yog dab tsi?
