Teb tiav: Selaginella thiab Salvinia yog ob qho piv txwv ntawm heterosporous pteridophytes.
Cov piv txwv heterosporous yog dab tsi?
HETEROSPORY:- Qhov no yog qhov xwm txheej hauv lub cev uas lub cev (cov nroj tsuag) tsim tau ob hom kev sib txawv ntawm kev ua si (morphologICALLY) i.e, ib qho kev ua si loj thiab lwm tus yog ib qho kev ua si me me uas tsis tshua muaj nqi. HETEROSPORY. EXAMPLE
:- Selaginella, Salvinia
Ntawm no leej twg yog tus hauv qab no yog heterosporous?
(b) Los ntawm cov hauv qab no Salvinia yog heterosporous. Heterospory yog kev tsim cov spores ntawm ob qhov sib txawv thiab ob txoj kev loj hlob sib txawv. Cov spores me me hu ua microspores thiab loj dua li megaspore.
YPuas Azolla yog heterosporous Fern?
Cov nplooj yog ob-lobed: ib qho ntab dorsal lobe thiab ib lub ventral lobe submerged. Azolla is heterosporous thiab nqa indusiaate sori ntawm luv stalks surrounded los ntawm parenchymatous txheej hu ua lub hnab ntawv sorophore (Nagalingum li al., 2006).
YPuas yog marsilea thiab Azolla heterosporous?
Selaginella, Salvinia, Marsilea thiab Azolla yog heterosporous pteridophytes. Salvia yog heterosporous angiosperm.
