Qhov txawv ntawm angiosperms thiab gymnosperms yog tias angiosperms muaj paj thiab txiv hmab txiv ntoo thaum gymnosperms tsis muaj paj lossis txiv hmab txiv ntoo.
Cov noob qoob loo tsim cov noob. Muaj ob pawg loj ntawm cov noob nroj tsuag: angiosperms (flowering nroj tsuag) thiab gymnosperms. Angiosperms dais kaw cov noob hauv cov txiv hmab txiv ntoo thaum gymnosperms dais cov noob liab qab. Tsis tas li ntawd, angiosperms tsim ib lub paj zoo li lawv cov qauv kev loj hlob thaum gymnosperms tsis muaj paj. Ib yam li ntawd, muaj qhov sib txawv loj ntawm angiosperms thiab gymnosperms.
Angiosperms yog dab tsi?
Angiosperms lossis anthophytes yog cov nroj tsuag siab tshaj plaws hauv lub nceeg vaj Plantae. Cov nroj tsuag tseem ceeb yog sporophyte, uas yuav yog dioecious lossis monoecious. Lub sporophyte muaj qhov sib txawv ntawm qhov tseeb qia, nplooj thiab cov hauv paus hniav. Lawv kuj muaj cov ntaub so ntswg zoo tsim. Tsis tas li ntawd, lub xylem muaj cov hlab ntsha, thiab phloem muaj cov hlab ntsha thiab cov hlwb ua ke. Lawv muaj qhov sib txawv ntawm kev ua me nyuam, uas yog paj. Tsis tas li ntawd, cov anthophytes yog heterosporous. Cov ovules tsim nyob rau hauv lub zes qe menyuam. Lub zes qe menyuam tsim los ntawm folding ntawm megasporophylls hu ua carpels.
Daim duab 01: Angiosperms
Ntxiv mus, angiosperms muaj lub paj noob hlis coj txiv neej nuclei lossis gametes ntawm lub zes qe menyuam. Yog li ntawd, tsis muaj dej sab nraud lossis cov kua dej sab hauv yog tsim nyog rau fertilization. Yog li, cov spermatozoids tsis yog kev txav mus los. Qhov tseem ceeb tshaj plaws, ob lub fertilization tshwm sim hauv angiosperms, tsim lub diploid embryo thiab triploid endosperm. Tsis tas li ntawd, lawv tsim cov noob muaj tseeb nyob hauv cov txiv hmab txiv ntoo.
Tsis tas li ntawd, cov angiosperms muaj cov ntaub so ntswg zoo. Lawv muaj cov kab mob vascular tag nrho nrog cov hlab ntsha, cov hlab ntsha thiab cov hlwb ua ke. Lawv kuj muaj cov nroj tsuag sib txawv heev rau hauv cov hauv paus hniav, stems thiab nplooj. Tsis tas li ntawd, lawv muaj ib tug zoo-tsim cuticle thiab noob. Tag nrho cov yam ntxwv no tau ua rau lawv tsim nyog rau lub neej hauv av.
Gymnosperms yog dab tsi?
Gymnosperms kuj yog cov nroj tsuag muaj noob uas suav nrog conifers, cycads, ginkgo, thiab Gnetales. Lawv cov nroj tsuag tseem ceeb yog sporophyte uas sib txawv rau hauv nplooj, qia thiab hauv paus hniav. Cov ntaub so ntswg thiab cov tshuab tshuab muaj nyob hauv cov nroj tsuag no. Ntxiv mus, gymnosperms muaj ob hom nplooj. Vegetative nplooj yog loj thiab pinnately compound. Cov nplooj me qhia circinate vernation.
Tsis tas li, cov no yog cov nroj tsuag dioecious, thiab cov nroj tsuag poj niam dais lub crown ntawm megasporophylls, thaum txiv neej cov nroj tsuag dais microsporophylls nyob rau hauv lub khob hliav qab. Ntawm no, cov megasporophylls dais liab qab lossis nthuav tawm ovules ntawm lawv cov npoo sab nraud. Thiab, cov ovules liab qab no dhau los ua cov noob tom qab fertilization. Tsis tas li ntawd, zoo ib yam li angiosperms, gymnosperms kuj heterosporous. Ob leeg txiv neej thiab poj niam gametophytes me me thiab nyob ntawm sporophyte. Tsis tas li ntawd, tsis muaj dej sab nraud yog tsim nyog rau lawv fertilization. Cov noob germinates kom nce mus rau sporophyll.
Daim duab 02: Gymnosperms
Ib qho piv txwv ntawm cycads yog cycas. Cycas sporophyte zoo li lub xib teg. Nws muaj ib tug taproot system nrog lwm cov hauv paus hniav branching tawm. Qee cov hauv paus hniav ntawm gymnosperms hu ua coralloid cov hauv paus hniav tsis zoo geotropic. Nyob rau hauv lub cortex ntawm cov hauv paus hniav, muaj cyanobacteria nyob symbiotically. Lub qia yog pillar-zoo li thiab dais ib tug crown ntawm nplooj ntawm apex. Lub qia yog tag nrho ntawm nplooj caws pliav thiab qhia cov thickenings theem nrab thiab.
Dab tsi yog qhov zoo sib xws ntawm Angiosperms thiab Gymnosperms?
- Angiosperms thiab gymnosperms yog cov noob nroj tsuag.
- Lawv kuj yog cov nroj tsuag vascular.
- Cov sporophyte yog cov nroj tsuag tseem ceeb ntawm ob pawg, yog li ob leeg muaj qhov txo qis gametophytic theem.
- Lawv muaj cov qauv cog zoo.
- Ntxiv mus, ob hom yog heterosporous.
Qhov txawv ntawm Angiosperms thiab Gymnosperms yog dab tsi?
Angiosperms tsim cov noob, paj thiab txiv hmab txiv ntoo thaum gymnosperms tsim cov noob liab qab thiab tsis tsim cov txiv hmab txiv ntoo lossis paj. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm angiosperms thiab gymnosperms. Tsis tas li ntawd, gymnosperms tsim cov txiv neej thiab poj niam cones, thaum angiosperms tsis tsim cones.
Ntxiv mus, qhov sib txawv ntxiv ntawm angiosperms thiab gymnosperms yog tias cov angiosperms nqa tawm ob zaug fertilization thaum gymnosperms tsis ua ob zaug fertilization. Thaum xav txog lawv cov phev, phev ntawm gymnosperms muaj flagella thaum phev ntawm angiosperms tsis muaj flagella. Yog li, peb tuaj yeem txiav txim siab qhov no ib yam li qhov sib txawv ntawm angiosperms thiab gymnosperms.
Summary – Angiosperms vs Gymnosperms
Hauv luv luv, angiosperms thiab gymnosperms yog ob pawg ntawm cov noob nroj tsuag. Qhov sib txawv tseem ceeb ntawm angiosperms thiab gymnosperms nyob ntawm cov noob ntawm txhua pawg. Angiosperms muaj cov noob ntim nrog txiv hmab txiv ntoo thaum gymnosperms muaj cov noob liab qab. Tsis tas li ntawd, angiosperms tsim ib lub paj thaum gymnosperms tsis tsim paj. Lwm qhov tshwj xeeb ntawm angiosperms yog ob lub fertilization, uas tsis muaj nyob rau hauv gymnosperms. Yog li, qhov no qhia txog qhov sib txawv ntawm angiosperms thiab gymnosperms.
