Strobili or cones are found in

In ferns,young leaves are protected by

"Botanical snakes" are

$S$: In $Pteridophytes$,spores are produced in sporangia.
$R$: In $Pteridophytes$,sporangia are produced on sporophylls.

Which of the following are seedless plants that possess vascular tissues?

How many of the following statements are true about $Azolla$?
$(a)$ It is free-floating.
$(b)$ It has bilobed leaves.
$(c)$ It is nitrogen-fixing.
$(d)$ It is a climber.
$(e)$ It has Aerenchyma in the ventral lobe of the leaf.