![Hom spicules twg tsis nyob hauv sycon? Hom spicules twg tsis nyob hauv sycon?](https://i.tvmoviesgames.com/preview/questions/17931170-which-type-of-spicules-are-absent-in-sycon-j.webp)
2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nws tuaj yeem pom nyob rau hauv daim ntawv ntawm cov ceg ntoo uas muaj siliceous spicules tau kos. Hauv Keratosa, spicules tsis muaj kiag li thiab spongin ib leeg yog tsim.
Cov spicules twg muaj nyob hauv sycon?
Lub cev ntawm sycon daim txhuam cev yog tsim los ntawm txheej dermal txheej thiab sab hauv gastral txheej Nyob rau hauv nruab nrab ntawm ob txheej mesenchyme yog tam sim no. Qhov no mesenchyme muaj amoebocytes. Lub scleroblasts secrete spicules uas los ntawm lub cev pob txha ntawm lub cev sycon. Cov spicules no yog tsim los ntawm cov khoom calcareous.
3 hom spicules hauv porifera yog dab tsi?
Raws li tus naj npawb ntawm cov axis tam sim no nyob rau hauv cov rays spicules yuav muaj peb hom: monoaxon, triaxon thiab polyaxon. Monaxon: Cov spicules no loj hlob raws ib qho axis. Cov no tej zaum yuav ncaj koob zoo li tus pas nrig-zoo li los yog tej zaum yuav nkhaus. Lawv qhov kawg tej zaum yuav taw tes, pob qhov rooj los yog hooked.
hom spicules muaj nyob hauv chav kawm calcarea?
Cov calcareous sponges ntawm chav kawm Calcarea yog cov tswv cuab ntawm cov tsiaj phylum Porifera, cellular sponges. Lawv yog cov yam ntxwv los ntawm spicules ua tawm ntawm calcium carbonate nyob rau hauv daim ntawv ntawm calcite los yog aragonite. Thaum cov spicules hauv ntau hom muaj peb lub ntsiab lus, hauv qee hom lawv muaj ob lossis plaub lub ntsiab lus.
Dab tsi yog spicules lossis spongin Fibres?
Cov pob txha pob txha ntawm daim txhuam cevyog spicules thiab spongin fibers. Spicules yog tsim los ntawm carbonates ntawm txiv qaub los yog silica nyob rau hauv daim ntawv ntawm koobzoo li daim. Spongin fibers yog tsim los ntawm silk-zoo li scleroprotein.
Pom zoo:
Lub sycon nyob qhov twg?
![Lub sycon nyob qhov twg? Lub sycon nyob qhov twg?](https://i.tvmoviesgames.com/preview/questions/17841838-where-is-the-sycon-found-j.webp)
Sycon ciliatum feem ntau pom ntawm ntug dej hauv qab los yog txuas rau pob zeb thiab plhaub ntawm ntug dej qis. Nws tshwm sim nyob rau hauv qhov ntiav sublittoral thiab tam sim no nyob rau hauv cov dej tob mus rau 100 m qhov tob. Nws kuj loj hlob ntawm seaweeds xws li.
Muaj pes tsawg hom tsiaj nyob hauv ib qho chaw nyob?
![Muaj pes tsawg hom tsiaj nyob hauv ib qho chaw nyob? Muaj pes tsawg hom tsiaj nyob hauv ib qho chaw nyob?](https://i.tvmoviesgames.com/preview/questions/17849597-has-high-number-of-species-living-in-an-ecosystem-j.webp)
Txoj kev nplua nuj yog qhov loj tshaj hauv tropical ecosystems. Tropical rain forests nyob rau hauv av thiab coral reefs nyob rau hauv marine systems yog cov feem ntau biologically ecosystems nyob rau hauv lub ntiaj teb no thiab tau dhau los ua qhov tseem ceeb ntawm cov neeg nyiam.
Nyob rau hauv lub system twg yog tsoom fwv hauv nruab nrab tsis muaj zog tshaj?
![Nyob rau hauv lub system twg yog tsoom fwv hauv nruab nrab tsis muaj zog tshaj? Nyob rau hauv lub system twg yog tsoom fwv hauv nruab nrab tsis muaj zog tshaj?](https://i.tvmoviesgames.com/preview/questions/17884527-in-which-system-is-the-central-government-weakest-j.webp)
Lub hauv paus tseemfwv hauv tebchaws Meskas hu ua tsoomfwv, thiab nws qhov tsis muaj zog tshaj plaws yog nws tsis muaj peev xwm tiv thaiv thiab tswj hwm hnub ib hnub… nom tswv twg uas muaj tsoom fwv tsis muaj zog tshaj plaws? Cov Kab lus ntawm Confederation sawv cev rau tsoomfwv txoj cai, a confederation, uas muaj tsoomfwv tsis muaj zog thiab tsoomfwv lub xeev muaj zog.
Leej twg detering nyob rau hauv tag nrho cov nyob ntsiag to nyob rau sab hnub poob pem hauv ntej?
![Leej twg detering nyob rau hauv tag nrho cov nyob ntsiag to nyob rau sab hnub poob pem hauv ntej? Leej twg detering nyob rau hauv tag nrho cov nyob ntsiag to nyob rau sab hnub poob pem hauv ntej?](https://i.tvmoviesgames.com/preview/questions/17920706-who-is-detering-in-all-quiet-on-the-western-front-j.webp)
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.
Nyob rau hauv kev paub txog hom tsis muaj npe?
![Nyob rau hauv kev paub txog hom tsis muaj npe? Nyob rau hauv kev paub txog hom tsis muaj npe?](https://i.tvmoviesgames.com/preview/questions/17924605-in-unaided-brand-awareness-j.webp)
Kev paub txog hom tsis muaj npe qhia tau hais tias koj lub hom phiaj kev nyiam yog qhov tseem ceeb txaustias koj lub hom phiaj yog lub siab rau cov neeg siv khoom. Txhawm rau ntsuas kev paub txog hom lag luam uas tsis muaj npe, koj yuav nug cov lus nug qhib, qhov twg koj tsis hais koj lub npe hom tshwj xeeb.