From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in

The development of the suspensor in Selaginella is attributed to which part of the embryo?

Which of the following are called vascular cryptogams?

In pteridophyte, the sporophytes consist of leaf-like appendages called

Nephrolepis is a

‘Club moss’ belongs to

The 13-celled male gametophyte in Selaginella is

‘Club moss’ belongs to

Two very distinst generations are found in the life cycle of

Pteridophytes differ from bryophytes in the

Consider the following statement regarding heterospory

I. Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous

II. The megaspores and microspores germinate and give rise to female and male gametophyte respectively

III. The female gametophytes in these plants are retained on the parent sporophytes for variable periods

IV. The development of the zygotes into young embryos takes place within the female gametophytes

V. This event is a precursor to the seed habit considered an important step in evolution