Puas yog Placozoans muaj cov ntaub so ntswg sib txawv?
Puas yog Placozoans muaj cov ntaub so ntswg sib txawv?

Video: Puas yog Placozoans muaj cov ntaub so ntswg sib txawv?

Video: Puas yog Placozoans muaj cov ntaub so ntswg sib txawv?
Video: Plab Plab Ntswg..(Pluav Pluav Ntswg) Maiv Twm New Song 2023-2024 2024, Kaum ib hlis
Anonim

Cov kev tshawb fawb molecular phylogenetic tsis ntev los no qhia tias cov placozoans yog ze ze rau cnidarians. Yog tias qhov kev tshawb pom no tau lees paub, nws yuav txhais tau tias tus placozoans yog ib tug thib ob simplification ntawm ntau complex cov poj koob yawm txwv uas muaj tag nrho cov ntaub so ntswg sib txawv thiab lub cev , nrog rau cov leeg thiab cov hlab ntsha.

Ib yam li ntawd, Placozoans puas tuaj yeem tsim kev sib deev?

Placozoans tuaj yeem yug me nyuam asexually los ntawm tog twg los binary fission los yog, tsawg zaus, los ntawm budding. Qee qhov kev soj ntsuam hauv chav kuaj pom tias kev sib deev tej zaum yuav tshwm sim.

Qhov thib ob, cov txheej txheem uas Placozoans txav mus yog dab tsi? 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 ntawm fission, tab sis kuj paub hais tias yug me nyuam ntawm kev sib deev.

Kuj paub, yog Placozoans Diploblastic?

Cov Placozoa yog ib daim ntawv basal ntawm dawb-nyob (non-parasitic) multicellular kab mob. Lawv yog cov yooj yim tshaj plaws nyob rau hauv cov qauv ntawm tag nrho cov tsiaj. Peb genera tau pom: classical Trichoplax adhaerens, Hoilungia hongkongensis, thiab Polyplacotoma Mediterranea, qhov kawg tshwm sim feem ntau basal.

Trichoplast yog dab tsi?

Lub trichoblast yog ib lub xovtooj ntawm sab nrauv ntawm cov nroj tsuag hauv paus uas yog lub luag haujlwm rau kev tsim cov hauv paus plaub hau. Ib tsob nroj cov hauv paus hniav yog them rau cov hlwb intrichoblast kom paub meej cov hauv paus kev loj hlob thiab kev loj hlob.

Pom zoo: