In $Dryopteris$,the sori are borne:

In $Pteridophytes$,the gametophyte is:

The species that grows on open rocks is known as:

What are the characteristics of prophylls?

In $Pteridophytes$,meiosis occurs during which of the following processes?

$A$: Seeds are formed by some species of spike moss.
$R$: All conditions for seed habit are fulfilled by these species of spike moss.