Qhov sib txawv tseem ceeb ntawm hydroids thiab leptoids yog tias hydroids yog cov hlwb tshwj xeeb uas ua dej hauv bryophytes thiab zoo sib xws rau tracheids hauv cov nroj tsuag vascular, thaum leptoids yog cov hlwb tshwj xeeb uas thauj cov piam thaj hauv bryophytes thiab zoo sib xws rau cov ntsiab lus hauv vascular. nroj tsuag.
Bryophytes yog ib pawg ntawm cov nroj tsuag tsis muaj kab mob. Qhov tseeb, lawv yog cov nroj tsuag primitive uas tsis muaj tseeb qia, cag thiab nplooj. Lawv tsis muaj xylem lossis phloem. Txawm li cas los xij, qee cov mosses, mosses tshwj xeeb tshaj yog nyob rau hauv moss subclass Polytrichidae, muaj cov hlwb tshwj xeeb los ua dej, minerals thiab qab zib. Hydroids yog cov hlwb tshwj xeeb uas thauj dej thiab cov zaub mov hauv qee cov mosses. Lawv zoo sib xws rau tracheids hauv cov nroj tsuag vascular. Leptoids yog lwm hom hlwb tshwj xeeb uas thauj cov piam thaj thiab lwm cov as-ham hauv bryophytes. Ntxiv mus, lawv yog cov analogous rau sieve ntsiab ntawm vascular nroj tsuag.
YDab tsi yog Hydroids?
Hydroids yog cov hlwb tshwj xeeb pom nyob rau hauv qee cov mosses uas thauj dej thiab cov zaub mov tau los ntawm cov av. Cov hlwb no zoo sib xws rau tracheids hauv cov nroj tsuag vascular. Txawm li cas los xij, tsis zoo li tracheids, lawv tsis muaj lignin hauv lawv cov phab ntsa ntawm tes. Lawv yog cov elongated hlwb uas muaj overlapping kawg phab ntsa. Tsis tas li ntawd, lawv muaj qhov pores hauv lawv cov phab ntsa nyias nyias. Feem ntau, hydroids tsis muaj qhov hnyav ntxiv hauv lawv cov phab ntsa ntawm tes. Lawv tuag thiab npliag thaum loj hlob. Hydroids muaj nyob rau hauv lub gametophytic theem ntawm ib tsob nroj lub neej voj voog thiab nyob rau hauv lub seta nyob rau hauv lub sporophytic theem.
Daim duab 01: Hydroids (A) thiab Leptoids (B) hauv Moss Stem Hla Ntu
Leptoids yog dab tsi?
Leptoids yog hom kab mob vascular uas tshwj xeeb los thauj cov piam thaj hauv qee cov mosses. Yog li ntawd, lawv yog analogous rau sieve ntsiab nyob rau hauv vascular nroj tsuag. Zoo ib yam li hydroids, leptoids kuj yog cov hlwb elongated uas muaj cov phab ntsa sib tshooj. Leptoids muaj callose. Lawv nyob ib puag ncig hydroids, tsim ib txheej ncig lawv. Leptoids yog cov nyob hauv hlwb, txawm tias thaum loj hlob. Txawm li cas los xij, lawv cov nuclei degenerate thaum loj hlob. Cov hlwb no muaj nyob rau hauv theem gametophytic ntawm lub voj voog ntawm cov nroj tsuag thiab hauv seta hauv sporophytic theem.
Dab tsi yog qhov zoo sib xws ntawm Hydroids thiab Leptoids?
- Hydroids thiab leptoids yog ob hom vascular hlwb pom hauv qee cov mosses.
- Lawv zoo sib xws rau cov ntaub so ntswg hauv vascular nroj tsuag.
- Tab sis lawv tsis muaj lignin, tsis zoo li cov ntaub so ntswg.
- Lawv tshwm sim nyob rau theem gametophytic ntawm cov nroj tsuag lub neej voj voog thiab hauv seta nyob rau theem sporophytic.
- Ob leeg hydroids thiab leptoids yog cov hlwb elongated.
- Lawv muaj cov phab ntsa sib tshooj.
- Ob hom cell muaj pores hauv lawv cov phab ntsa cell.
Qhov txawv ntawm Hydroids thiab Leptoids yog dab tsi?
Hydroids thiab leptoids yog cov elongated hlwb uas ua raws li vascular hlwb hauv qee cov mosses. Hydroids yog dej thiab ntxhia ua cov hlwb tshwj xeeb, thaum leptoids yog cov hlwb tshwj xeeb uas ua cov piam thaj. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm hydroids thiab leptoids.
Ntxiv mus, hydroids yog qhov zoo sib xws rau tracheids hauv cov nroj tsuag vascular, thaum leptoids yog qhov sib piv rau cov hlab ntsha hauv cov nroj tsuag vascular. Yog li, qhov no yog lwm qhov sib txawv tseem ceeb ntawm hydroids thiab leptoids. Tsis tas li ntawd, hydroids yog cov hlwb innermost pom nyob rau hauv moss qia thaum leptoids ua ib txheej nyob ib ncig ntawm cov hydroids nyob rau hauv lub moss qia.
Hauv qab infographic qhia txog qhov sib txawv ntawm hydroids thiab leptoids.
Summary – Hydroids vs Leptoids
Feem ntau, bryophytes tsis muaj cov ntaub so ntswg thiab ntxiv dag zog rau cov ntaub so ntswg. Tab sis, qee cov mosses muaj ob hom vascular hlwb ua hydroids thiab leptoids. Hydroids thauj dej thiab cov zaub mov hauv cov mosses, thaum leptoids thauj sucrose hauv qee cov mosses. Yog li ntawd, hydroids yog analogous rau tracheids nyob rau hauv vascular nroj tsuag, thaum leptoids yog analogous rau sieve ntsiab nyob rau hauv vascular nroj tsuag. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm hydroids thiab leptoids.
