Sphenopsida class belongs to $ . . . . . . $.

Vascular cryptogams or seedless vascular plants are included in .......

"Botanical snakes" are

$Anabaena$ is associated with the .......... of $Azolla$.

Pteridophytes that produce strobili (cones) are .....

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