Which pteridophytes produce microsporophylls and megasporophylls?

The dominant generation in pteridophytes is:

In fern plants,the ejection of spores with force is achieved by the

In $Selaginella$,when the sporophyte develops directly from the female gametophyte other than the oosphere,the condition is called:

Strobili or cones are found in

What is required for fertilization in the plant shown in the given figure?