Strobili or cones are found in:

The presence of ciliated antherozoids in $Dryopteris$ indicates:

In $Selaginella$,the embryo develops into:

Heterospory,i.e.,the formation of two types of spores—microspores and megaspores—is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in the plant kingdom?

What is the dominant phase of a pteridophyte?

Antherozoids of fern are