Leaf of which of the following plants shows circinate vernation at the young stage?

In some pteridophytes, sporophylls form distinct compact structures called $A$ in $B$ and $C$. Here $A, B$, and $C$ refer to:

The formation of a sporophyte (fern) from a gametophyte (prothallus) without fertilization is known as .......... .

Ferns are characterised by

Apical growth of the lower vascular plants takes place by an apical cell. This cell is generally pyramidal. Though four-sided in shape,it is often referred to as a three-sided cell because

The main plant body is differentiated into true root,stem,and leaves in: