Video: Placozoans pom nyob qhov twg?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Lawv yog cov qauv yooj yim tshaj plaws ntawm txhua tus tsiaj. Peb genera tau pom : classical Trichoplax adhaerens, Hoilungia hongkongensis, thiab Polyplacotoma mediterranea, qhov kawg tshwm sim feem ntau hauv paus.
| Placozoa | |
|---|---|
| Lub Nceeg Vaj: | Animalia |
| Subkingdom: | Eumetazoa |
| Clade: | ParaHoxozoa |
| Phylum: | Placozoa Grell, 1971 |
Ntxiv mus, Placozoans tuaj yeem rov tsim dua kev sib deev?
Placozoans tuaj yeem yug me nyuam asexually los ntawm ob qho kev sib cais lossis tsawg dua, los ntawm kev tawg paj. Qee qhov kev soj ntsuam kuaj pom hais tias deev me nyuam tej zaum yuav tshwm sim.
Tom qab ntawd, lo lus nug yog, dab tsi yog txheej txheem uas Placozoans txav mus? Placozoans txav Los ntawm gliding, pab los ntawm ciliated hlwb ntawm basal epithelial txheej, thiab pub los ntawm engulfing hais ntawm organic detritus. Lawv muaj peev xwm yug me nyuam asexually los ntawm fission, tab sis kuj paub tias yug me nyuam kev sib deev.
Ntawm no, Placozoans puas muaj lub paj hlwb?
Placozoans , qhov yooj yim tshaj plaws ntawm tag nrho cov tsiaj, zoo li ib tug me me, cov plaub hau disc txog 1 hli nyob rau hauv loj, tsuas yog peb txheej cell. Txawm hais tias lawv muaj tsis muaj tseeb paj hlwb lossis cov leeg nqaij, lawv hla hla txhua qhov chaw hauv dej hiav txwv nrog pom yooj yim.
Dab tsi yog plaub hom cell hauv trichoplax Adhaerens piav qhia lawv qhov chaw nyob hauv tsiaj?
Trichoplax muaj ntawm tsawg kawg rau somatic hom xov tooj : qab thiab ventral epithelial qhov chaw hlwb lipophils, fiber ntau hlwb , cev cell thiab siv lead ua hlwb.
Pom zoo:
Qhov chaw nyob ntawm thawj lub tsev kawm qib siab kho hniav nyob hauv ntiaj teb nyob qhov twg?
Dr. John M. Harris tau pib lub ntiaj teb thawj lub tsev kho hniav hauv Bainbridge, Ohio, thiab tau pab tsim kho hniav raws li kev noj qab haus huv. Nws qhib rau 21 Lub Ob Hlis 1828, thiab niaj hnub no yog tsev khaws puav pheej kho hniav. Thawj lub tsev kawm kho hniav, Baltimore College ntawm Kev Kho Hniav, tau qhib hauv Baltimore, Maryland, Asmeskas xyoo 1840
Thawj qhov muag pom qhov muag nyob qhov twg?
Occipital lub cev
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Qhov kev tiv thaiv qhov txhab feem ntau pom nyob qhov twg?
Kev tiv thaiv qhov txhab feem ntau pom ntawm ob txhais tes thiab hauv pliaj, qhov chaw uas tus neeg raug tsim txom tau tsa lawv los tiv thaiv lub taub hau thiab lub ntsej muag lossis tiv thaiv kev ua phem, tab sis kuj tseem muaj nyob ntawm ko taw thiab ob txhais ceg uas tus neeg raug tsim txom sim tiv thaiv thaum pw thiab ncaws. tawm ntawm tus neeg ua phem