Which of the following is of considerable economic importance?

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.

Spores of $Riccia$ are liberated by

Bryophytes comprise:

Which of the following plants is used as fuel?

What is the ploidy of the spore mother cells in bryophytes?