The prothallus of fern is

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:

In which of the following plant groups is a haplo-diplontic life cycle observed?

The development of young embryos of pteridophytes within the female gametophytes is a precursor to the

In pteridophytes,reduction division occurs in .........?

In pteridophytes,spores germinate to give rise to