Lub club mosses, lossis Lycophyta, yog pab pawg ntxov tshaj plaws ntawm cov nroj tsuag tsis muaj vascular. Lawv tau tswj hwm thaj chaw ntawm Carboniferous lub sijhawm, loj hlob mus rau hauv cov ntoo siab thiab tsim cov hav zoov loj.
Cov nroj tsuag twg nyob rau lub sijhawm Carboniferous?
Nroj tsuag. Carboniferous terrestrial ib puag ncig tau dominated los ntawm vascular av nroj tsuag xws li me me, shrubby loj hlob mus rau ntoo siab tshaj ntawm 100 ko taw (30 meters). Cov pab pawg tseem ceeb tshaj plaws yog lycopods, sphenopsids, cordaites, noob ferns, thiab tseeb ferns
Dab tsi pab pawg tau tuav lub sijhawm Carboniferous thiab tam sim no hlawv li thee?
Lycophytes tshwm sim thaum lub sijhawm Devonian tab sis faib ua ob kab thaum lub sijhawm Carboniferous. Ib kab tau dhau los ua cov ntoo loj heev uas tau ploj mus txog li 300 lab xyoo dhau los, thiab ib feem zoo ntawm cov pa roj carbon monoxide uas lawv kho tau yog fossilized thiab tam sim no hlawv li thee.
Cov nroj tsuag twg suav tias yog tsob ntoo uas tsis muaj kab mob siab tshaj plaws thiab yog vim li cas?
Nrog lawv cov fronds loj, ferns yog cov nroj tsuag uas tsis muaj vascular pom zoo tshaj plaws. Lawv suav hais tias yog cov nroj tsuag uas tsis muaj vascular zoo tshaj plaws thiab pom cov yam ntxwv feem ntau pom hauv cov noob nroj tsuag. Ntau tshaj 20,000 hom ferns nyob hauv ib puag ncig xws li tropics mus rau temperate forests.
Pteridophytes nyob rau lub sijhawm twg yog cov nroj tsuag tseem ceeb?
Pteridophytes nroj tsuag muaj keeb kwm ntev ntev. Lawv tau raug lees paub nyob rau hauv lig Silurian lub sijhawm ntawm Paleozoic era. Cov nroj tsuag no muaj cov nroj tsuag tseem ceeb hauv tag nrho ntawm Paleozoic era.
