Txhua tus antheridium (txiv neej gametangium) tsim ntau cov phev motile flagellate phev, thiab txhua tus archegonium (poj niam gametangium) cov ntaub ntawv ib lub qe tsis muaj zog. Kev sib xyaw ntawm lub qe thiab cov phev (syngamy) tsim ib lub zygote thiab rov qab qib 2n ploidy.
Puas qe tsim hauv antheridia archegonia lossis Sporangia?
Sporangia tsim cov spores uas tsim ua me me, lub plawv zoo li gametophytes. Gametophytes muaj antheridia thiab archegonia. Antheridia tsim cov phev nrog ntau cilia; archegonia tsim qe. Fertilization tshwm sim thaum phev ua luam dej mus rau lub qe hauv ib lub archegonium.
YPob antheridia tsim spores?
Hauv qhov sib piv rau Lycopodium, cov sporophytes ntawm tag nrho cov spike mosses (Selaginella) muaj sporophylls nyob hauv strobili, thiab txhua hom Selaginella yog heterosporous; uas yog, lawv tsim sporesntawm ob qhov ntau thiab tsawg, qhov loj dua li megaspores thiab me dua li microspores.
Dab tsi yog lub luag haujlwm ntawm antheridia thiab archegonia?
Hint: Antheridia yog txiv neej pw hauv nruab nrog cev, thiab yog cov qauv haploid uas nws txoj haujlwm yog tsim cov txiv neej gametes hu ua antherozoids lossis phev. Archegonia yog poj niam txiv neej lub cev, uas tsim cov poj niam gametes feem ntau hauv cryptogams. Nws yog lub luag haujlwm rau kev tsim cov poj niam gametes uas yog qe qe lossis ov.
Dab tsi yog qhov antheridia thiab oogonia muaj tom qab meiosis tshwm sim?
Cov khoom txais yog cov ceg me me thiab muaj ntau yamkab noj hniav nrog cov pores sab nraud uas muaj antheridia (txiv neej) thiab oogonia (poj niam), tom qab ntawd los ntawm meiosis, phev (1n) thiab qe (1n) yog tsim. … Tom qab meiosis, qhov tsim sporangia dhau los ua cov sporangia paub tab uas tsim meiospores.
