2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Planarian yog tus tsiaj yooj yim tshaj plaws uas muaj lub cev npaj ntawm bilateral symmetry thiab cephalization . Lub hlwb ntawm cov dawb-nyob flatworms flatworms Cov helminths yog invertebrates characterized by elongated, ca los yog round lub cev. Nyob rau hauv kev kho mob schemes cov flatworms los yog platyhelminths (platy los ntawm Greek lub hauv paus ntsiab lus "flat") muaj xws li flukes thiab tapeworms. Roundworms yog nematodes (nemato los ntawm Greek hauv paus ntsiab lus "xov"). https://www.ncbi.nlm.nih.gov › books › NBK8282
Helminths: Qauv, Kev faib tawm, Kev Loj Hlob, thiab Kev Txhim Kho - NCBI
yog ib lub qauv bilobed nrog lub cortex ntawm paj hlwb thiab cov tub ntxhais ntawm cov hlab ntsha fibers nrog rau qee qhov uas txiav txim siab los tsim cov commissures.
Cephalization hauv planaria yog dab tsi?
Cov tswvcuab ntawm Phylum Platyhelminthes (tshwj xeeb yog qhov tseeb ntawm cov planarians, Chav Turbellaria) yog koom nrog lub hlwb thiab lub siab lub cev ntawm tus tsiaj pem hauv ntej. Qhov no hu ua cephalization. Nyob rau hauv cov tsiaj nrog cephalization, lub siab lub ntsws los ntawm ib puag ncig ua ntej.
Pob cov kab mob plab puas muaj cephalization?
Flatworms (phylum Platyhelminthes) yog cov tsiaj qub tshaj plaws nrog ob sab symmetry. Lawv kuj muaj qib siab tshaj plaws ntawm cephalization, nrog rau lub cev paub (photosensory thiab chemosensory cells) thiab lub paj hlwb concentrated ntawm qhov kawg.
Puas Planaria nthuav tawm kev nyob ib puag ncig?
Yog tias muaj kev ntxhov siab txaus tom qab noj mov, planaria yuav tshem tawm cov zaub mov uas tau noj yav dhau los ua kom muaj kev khiav tawm ntau dua. Latency rau noj nce nyob rau hauv lub xub ntiag ntawm tshiab stimuli, feem ntau yuav tsum tau ib tug sijhawm nyob ua ntejnoj mov (Zoo tshaj & Rubinstein, 1962).
Pob lub cev planarian nthuav tawm hom symmetry?
Ua ntej, cov neeg npaj muaj ob sab symmetrynrog ob lub paj uas nthuav dav lub cev ntev, qhov loj "hlwb" (ganglion cell), thiab ob lub qhov muag.
Pom zoo:
Koj puas tau tshaj tawm cov ntsiab lus-ntau yam hauv kev nkag-tswj- nthuav tawm-headers header?
Yog tias koj siv CORS, koj puas tau tshaj tawm Cov Ntsiab Lus-Range hauv Access-Control-Expose-Headers header? yog, tab sis cov lus teb zoo tshaj plaws yog daws nws hauv cov lus teb. Access-Control nthuav tawm cov headers ua dab tsi? Tus Access-Control-Expose-Headers teb header tso cai rau tus neeg rau zaub mov los qhia tias cov lus teb yuav tsum tau ua rau cov ntawv sau ua haujlwm hauv browser, teb rau qhov kev thov hla teb chaws.
Puas yog nthuav tawm lossis nthuav tawm?
Yog koj hais tias ib tug neeg tab tom nthuav tawm, koj tab tom thuam lawv rau kev sim ua kom neeg nyiam los ntawm kev qhia pom tseeb tias lawv ua tau lossis yam lawv muaj. Yog tias koj nthuav tawm ib yam dab tsi uas koj muaj, koj qhia rau ntau tus neeg lossis ua kom pom tseeb tias koj muaj nws, vim koj txaus siab rau nws.
Leej twg cov tswv yim tau nthuav tawm hauv kev tshaj tawm kev ywj pheej?
Thomas Jefferson siv cov kev xav ua ntej sau los ntawm John Locke thaum sau Daim Ntawv Tshaj Tawm ntawm Kev ywj pheej. Lo lus "lub neej, kev ywj pheej, thiab nrhiav kev zoo siab," yog ib lub tswv yim thawj zaug uas Locke nyob rau hauv nws ob Treatises ntawm tsoom fwv.
Qhov twg yog nthuav lossis nthuav tawm?
Expound txhais tau tias "piav qhia meej." Expand txhais tau tias "piav qhia ntau dua." Yog li thaum expound tsis qhia meej meej, nthuav dav yog sib piv. Txhua yam koj tuaj yeem qhia tau tseeb thaum tus neeg A hais tias tus neeg B tau "
Puas rotifer nthuav tawm cephalization?
Npaj yog cephalized heev; lawv yog thawj tug tsiaj uas peb saib nyob rau hauv lub lab uas tiag tiag tig rov qab. Cephalization yog ib tug yam ntxwv ntawm tag nrho cov bilaterally symmetrical tsiaj. … Flatworms, nematodes thiab rotifers yog protostomes, thawj qhov qhib nyob rau hauv lub pob ntawm embryonic hlwb ua lub qhov ncauj.
