The characteristic feature of a fern is:

The gametophytic generation in pteridophytes is commonly called

The fern prothallus is:

$A$: Events precursor to the seed habit are seen in some members of pteridophytes.
$R$: Development of the zygotes into young embryos takes place within the female gametophyte.

What is the gametophytic stage of Pteridophytes?

Give scientific reasons: In pteridophytes,the development of the zygote inside the female gametophyte is considered an important phase.