Siphonostele yog ob hom: 1. Ectophloic siphonostele: Hauv hom no, lub hauv paus pith yog nyob ib puag ncig los ntawm xylem, phloem, pericycle, thiab endodermis. Nws muaj nyob rau hauv Osmunda thiab Equisetum.
Siphonostele muab piv txwv yog dab tsi?
Ib lub stele uas cov ntaub so ntswg nyob rau hauv daim ntawv ntawm ib lub tog raj kheej nyob ib ncig ntawm lub pith, xws li nyob rau hauv cov stems ntawm feem ntau ferns thiab lwm yam seedless vascular nroj tsuag. … npe. 1. Dictyostele.
Nyob rau hauv dab tsi protostele pom?
Hint: Protosteles feem ntau pom hauv Equisetum thiab Dryopteris. Lawv raug suav hais tias yog thawj cov nroj tsuag uas tau hloov zuj zus hauv ntiaj teb. Protostoles muaj nyob rau hauv cov nroj tsuag vascular. Lub zej zog no tsis muaj noob, vascular, thiab cryptogam.
Protostele piv txwv yog dab tsi?
Tus protostele muaj ib tug solid xylem core; lub siphonostele muaj lub hauv paus qhib lossis ib qho uas muaj cov ntaub so ntswg hu ua pith. Cov kab mob vascular tsis tu ncua ntawm monocots (piv txwv li, nyom) muaj cov kab tawg tawg; cov kab mob vascular tas mus li ntawm dicots (piv txwv li, roses) ncig lub hauv paus pith.
Dab tsi yog siphonostele thiab nws hom?
2. Siphonostele: Hauv siphonostele xylem yog ncig los ntawm phloem nrog pith ntawm qhov chaw. Nws suav nrog Ectophloic siphonostele, Amphiphloic siphonostele, Solenostele, (i) Ectophloic siphonostele: Lub phloem tsuas yog txwv rau sab nraud ntawm xylem.
