Leaves that produce microspores and megaspores are called:

In which of the following is the stem clearly differentiated into nodes and internodes?

$A.$ $Nephrolepis$ is a cryptogam.
$R.$ It is a bryophyte.

In ferns,sporangia are borne on the

Which of the following is a fossil pteridophyte?

Assertion $(A)$: The sporophyte phase of ferns is long-lived and dominant.
Reason $(R)$: In ferns,the sporophyte phase exists as a thallus.