$Pteridium$ possesses:

In some of the pteridophytes and gymnosperms,the sporophylls aggregate at the apices of the main stem or its branches to form definite compact structures. These compact structures are called:

Which of the following is a characteristic feature of ferns?

Leaves that produce microspores and megaspores are called:

In the plant shown in the given figure,which is the independent and dominant phase?

Seed habit is first observed in some: