The main plant body of a bryophyte is .....

In bryophytes,the sporophyte stage is responsible for which of the following?

Select the correct option for mosses:

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.

An archegonium of $Riccia$ has:

Mosses (along with lichen) are of great ecological importance because