What is the type of vascular bundle found in the roots of ferns (Dryopteris)?

In pteridophytes,the sporophylls may form distinct compact structures called .....

Which of the following is a correctly matched pair?

Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence.
$A.$ Prothallus stage
$B.$ Meiosis in spore mother cells
$C.$ Fertilisation
$D.$ Formation of archegonia and antheridia in gametophyte.
$E.$ Transfer of antherozoids to the archegonia in presence of water.
Choose the correct answer from the options given below.

The heterosporous pteridophytes show certain characteristics,which are precursors to the seed habit in gymnosperms. Explain.

The first evolution of the seed habit occurred in which of the following?