2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev piav qhia: Sympatric speciation tshwm sim thaum ib hom kab mob ua ob hom sib txawv thaum nyob hauv tib cheeb tsam. Geographic teeb meem tsis ua lub luag haujlwm hauv lawv qhov kev sib txawv ntawm ib leeg. Allopatric speciation tshwm sim vim yog ib qho kev thaiv thaj tsam xws li roob toj siab.
Dab tsi yog kev sib cais thiab kev sib cais?
Kev tawg tshwm sim thaum ob peb tus tswv cuab ntawm ib hom tsiv mus rau thaj chaw tshiab, thaum kev sib cais tshwm sim thaum muaj xwm txheej tshwm sim rau lub cev faib cov kab mob.
Qhov txawv ntawm Allopatric thiab Parapatric speciation yog dab tsi?
Qhov sib txawv tseem ceeb ntawm allopatric speciation thiab peripatric speciation yog uas nyob rau hauv peripatric speciation, ib pawg tsawg dua li lwm tus. … Nyob rau hauv parapatric speciation (3), ib hom yog kis thoob plaws thaj chaw loj.
Kev sib haum xeeb hauv kev hloov pauv yog dab tsi?
Nyob rau hauv evolutionary biology thiab biogeography, sympatric thiab sympatry yog nqe lus hais txog cov kab mob uas nws qhov sib tshooj sib tshooj kom lawv tshwm sim ua ke tsawg kawg hauv qee qhov chaw. … Allopatric speciation yog evolution ntawm hom tshwm sim los ntawm thaj chaw cais ntawm ob los yog ntau tshaj cov pejxeem ntawm ib hom.
piv txwv parapatric speciation yog dab tsi?
Nyob thiab Speciation
Qhov piv txwv zoo tshaj plaws ntawm incipient parapatric speciation tshwm sim hauv cov pejxeem ntawm cov nyom Agrostis tenuis uas hla kuv cov tailingsthiab cov av ib txwm muaj. Cov neeg uas ua siab ntev rau cov hlau hnyav, ib qho cuab yeej cuab tam, muaj sia nyob zoo ntawm cov av tsis huv, tab sis tsis zoo ntawm cov av uas tsis muaj kab mob.
Pom zoo:
Nyob rau hauv angiosperms pollen yog tsim nyob rau hauv anthers ib feem ntawm?
Nyob rau hauv angiosperms, paj ntoos yog tsim los ntawm anthers ntawm the stamens hauv paj. Hauv gymnosperms, nws yog tsim nyob rau hauv microsporophylls ntawm microstrobili (txiv neej paj ntoos cones). Pollen muaj ib los yog ntau tshaj cov noob qoob loo thiab ib lub qe qe.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Nyob rau hauv vernalisation flowering nyob rau hauv cov nroj tsuag yog?
Vernalization (los ntawm Latin vernus, "ntawm lub caij nplooj ntoos hlav") yoginduction ntawm cov nroj tsuag flowering txheej txheem los ntawm raug rau lub caij txias ntawm lub caij ntuj no, los yog los ntawm ib qho khoom sib npaug.
Nyob rau hauv daim siab detoxifying enzymes nyob rau hauv dab tsi organelle?
Cov enzymes uas tsim cov lipid Cheebtsam ntawm lipoproteins nyob rau hauv daim nyias nyias ntawm ER smooth ER Lub du endoplasmic reticulum tsis muaj ribosomesthiab ua haujlwm hauv lipid synthesis tab sis tsis metabolism, kev tsim cov tshuaj hormones steroid, thiab detoxification.
Leej twg detering nyob rau hauv tag nrho cov nyob ntsiag to nyob rau sab hnub poob pem hauv ntej?
Detering yog tus neeg ua liaj ua teb los ntawm Txhua Tus Neeg Tsis Txaus Siabntawm Sab Hnub Poob los ntawm Erich Maria Remarque. Nws muaj siab mos siab muag, tshwj xeeb tshaj yog thaum nws los txog rau nees. Nws muaj kev kub ntxhov loj heev thaum nws hnov cov nees quaj thiab txawm sim tua lawv kom kawg lawv txoj kev txom nyem.
