In which part of the moss are oblique septa (cross-walls) found?

In $......$,spores do not form a protonema but grow directly into a flat,branched thallus.

The sporophyte of a bryophyte is .......

$A$: The gametophytic plant body of bryophytes is a thallus.
$R$: The gametophytic stage of bryophytes is haploid and autotrophic.

Choose the correct statement about liverworts.
$I.$ In liverworts,sexual reproduction occurs by the fusion of antherozoids and egg,which are produced in antheridium and archegonium,respectively.
$II.$ Both male and female sex organs may be present on the same thallus or different thalli.
$III.$ The zygote gives rise to a sporophyte,which is differentiated into foot,seta,and capsule.
$IV.$ Some cells of the capsule undergo meiosis and give rise to haploid spores.

Select the correct option for $Marchantia$.